I met a guy on the internet -which isn't unusual around here! but he knows someone ive slept with and this person told him and called me a slag. The guy I like let me know he'd said this but he said he'd started speaking to me before he knew about that and its in my past so it didn't change how he felt.

Ok, I would take his word for it.  From a relationship point of view, he probably doesn't like the fact you have a reputation with other people as a slag.  The fact that he got to know you before he found this out was definitely a good thing.  So I think you should believe him if he says he wants to put it in the past, though I doubt he's put it in the past in his head yet.  As much as he says that, there will still be something in the back of his mind about it, which will need to be erased with time, so that memory of you being branded a slag will need to be replaced with more positive things.

I've since been seeing the guy -he asked me to meet up with him after uni one day. he hugged me and paid for my bus fare home. then we went to a club, had a good time and he stayed in my house and i slept with him. the next day he invited me back to his house with him and he stayed with me all day -took me home and didnt leave until the last bus came. He invited me round to his house again this week and i met his mum and his brother who he said both like me :) and hes been introducing me to his friends -i've heard him on the phone just say "lindsey" as though hes already told them about me. he has also been behaving in a threatening way towards the guy who told him he'd slept with me and another guy who likes me -like warning them off.

That's all very good stuff, a guy doesn't introduce ladies to their parents, unless he sees you as a long term relationship possibility.  It sounds to me like he is taking that comment that you were a slag as something that was untrue.  After all this other guy that called you a slag, could be jealous that you have now found someone and are not going to go running back to him anytime soon.

he has only ever been with one girl before me -who he was with for 6 years. and at the back of my mind i'm worried that now hes free again i might just be an adventure for him. he said the sex with me is so great people would want to marry me. he also said he likes that we think the same things and say the same things and i make him laugh loads :)

I think at the moment you are being paranoid.  All the signs are that he has a rapport with you, he sees you as potential long term material because he's introduced you to his family and friends.  If you continue to be too paranoid it might start affecting your relationship.  So I think it's time you presumed he has good intentions, unless he does a series of negative things which prove otherwise.

he does say good things! but ive been used in the past so i get worried now

I think both men and women have bad past relationship experiences that they take into new relationships, but really you should learn from those experiences and then take each relationship as a fresh experience.  You can't punish a new guy for things that have happened in the past because ultimately that will affect him and your ability to have a good relationship with him.  I know it's common for women and men to think all men and all women are like this and that, but I hope I say enough on this web site to prove to you not all men and women are the same.

-i know men say what they have to to get what they want.

All men have to get what they want, all women have to get what they want.  It's part of a relationship and two people should either want the same thing or be able to compromise every now and then for the other person. 

and while i dont get that vibe from him i'm still worried that he found out about me sleeping with the other guy and might think of me as a slag.

Exactly, you don't get that vibe, so you should trust your instincts, unless proven wrong.  I don't think guys that use women for sex, would really put as much effort in as he has with you, if he thought you were a slag.  To put it bluntly, he would shag you and then put in as little effort as he could get away with.  He wouldn't want to spend too much money on you, wouldn't want to introduce you to friends and family, wouldn't want to integrate you into his everyday life.  So you need to erase any ideas that he is thinking you are a slag.

also, he's 21 and im 23 so i'm older and more experienced and i wonder if thats why hes interested.

Two years is not a big age difference.  I think I've said on my site plenty of times before that young guys that go for older women often do so for sexual experience.  But I'm talking more about women that are at least more than 5 years older, maybe more, you can't really put a number on it.  And as with anything it's not true of all guys.  I don't think two years is an issue in your situation, you obviously have a rapport with each and you go to uni together.

he always texts me first! i have never text him first because ive been testing to see how interested he is.

Again, that's brilliant, it shows that he is very keen on you. Though I don't recommend you continue this TEST, a guy can only tolerate so much of annoying tests from a woman.  You are either interested in him or not, you should be able to tell how keen he is in other areas, rather than relying on how soon and whether he initiates texts.  It's just too much of a silly game to play and if he gets the idea you are not that interested in him, then he will start to become frustrated and less than interested in you.

but today we didnt speak at all :( first time he hasnt text. i dont want to panic and start texting him first!

Why? I think you have just got into a bad habit of relying on him texting you and then all of a sudden you are starting to get paranoid because he hasn't text you for one single day.   What is this concept of not being able to text a guy?  I just don't understand it.  It all seems a bit silly to me, if you are going out with a guy, why shouldn't you be able to text him a reasonable amount of times, without it being an issue to him or you.

but were still both "single" and were both very laid back so ive been ok with that up til now

In my opinion, you are not single.  You are going out together, having sex together, meeting his family and friends.  That doesn't sound like single to me. 

-its only been about 2 weeks that weve been meeting up and i wouldnt want to push him into anything. so i dont feel like i can ask him if were an item yet! but im feeling insecure because there are loads of good looking girls younger than me

Whether a guy is going out with you or is married to you, there are always going to be good looking girls around.  The fact is, if he wanted to be with those good looking girls more than you, he would be with them.  He's chosen you and it's most likely because you have connected with him far better than those other good looking girls.  Good looking girls look good, it doesn't necessarily mean he is going to get on well with them or that they are going to feel the same attraction towards him.  Guys go out with women because they have connected well with those women.  He obviously thought you were attractive and that your personality suits him, why give you up for the chance of going out with a good looking girl that he might not get on so well with? 

Equally he could say, well there are plenty of good looking guys that you come into contact with, so why are you with him, because you like him and have connected with him, I would guess?

-and i always end up panicking and breaking it off with men because i start thinking that they can do much better than me and i dont want to get hurt :( and i just wanted some insight if you have time please.

The fact is, if he can do better than you, he would have disappeared by now.  You are the woman in his life at the moment, if things continue to go well, it's likely to continue that way.  If things stop going well, then he may sway towards other women.  But he's with you, you are his number one women, so just focus on that, instead of focusing on something that could happen.  When guys find a woman that they are attracted to and who they have a rapport with, they prefer to hold onto them, rather than gamble on another woman that comes along.  Because he could break up the relationship with you for another woman that only lasts a couple or weeks.  Then he's left without you and without the other women.  The safe bet at the moment is with you, the only time he will consider other women is if things are not going too well with you.  I just think you are being paranoid for no good reason at all, well actually I'll take that back, paranoid because you have maybe had bad experiences in the past with other guys.

In my opinion, based on what you have said, he really likes you and is trying to progress the relationship.

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