Im a 18year old hard working lady. i have been with my partner for the last 2years. we met when i was 16 and he was 26.

My partner, is now 28, lives with his mom/dad. Hasnt got a job - and spends alot of times "doing up" cars.

Do you really want to be with a bloke that does not have a job?  If you end up having children, who is going to provide the money to feed the children.  And at 28, he doesn't really have the excuse that he has only just started looking for a job.

I love my boyfriend to bits, but he doesnt show any interest in my personal life,

Not a good sign, sounds like he wants your body but not your mind.

or doesnt mind me going out with my single friends all the times.

I wouldn't mind you going out occasionally, but if you were going out constantly with your friends, I wouldn't be too pleased.  It does seem like he only wants to see you when he feels like it.  So you going out with your friends, to him is something to be savoured because it means he does not have to have an emotional attachment to you.

I love the freedom but i would like him to maybe ask me to spend more of the weekend with him.

You can have it three ways with boyfriends and only one is right for women.  You can have the boyfriend that is overprotective and devoted and doesn't want a woman to go out at all, because you might get off with someone else.  You can have a boyfriend that doesn't give a toss because they are only using you for the sex anyway.  Then the best option of a bloke that doesn't mind you going out every now and then.

i feel the relationship is coming to the end. i feel emotional drained.... im fed up of worrying about whats hes doing, and where this relationship is going...

So dump him, it sounds like he needs dumping.

Im scared of being alone, but i dont think i can take no more.

Take it, you've been going out for 2 years, so it's going to be difficult to give him up, but that's the way it's got to be.  Look for someone else.

the relationship is dead... my friends tell me to leave him, but my heart wont let go!

Yes, it is difficult to give up on a relationship you have enjoyed part of the time, but that is your mind trying to persuade you that you have got to used to being in this relationship and don't want to change.  Change is for the better when you are not enjoying yourself.