More questions on guys behaviour....

Why would a guy deliberately plonk his bags down, & stand in front of a shop, (approx a shop front or so in distance), but in line of sight with a woman he knows & but may not wish to talk to & who stood near a shop front, textin on phone?

He's trying to get noticed but wants you to notice him and go over to speak to him. 

The guy didn't look at her directly, mouth open & looks nervous, but his shoulders/feet are facing both her & also shop front?

He's nervous about this social situation, he wants you to approach but it's a location where a guy is not comfortable (shops) and where he is not used to talking to you.

Surely, if he saw her first, if he wanted to avoid talking to her, why didn't leave the area before she saw him?

He wanted you to notice him and approach him to talk. 

If he didn't approach the girl, does it mean he didn't really want to talk to her, & his body language suggesting keep away?...

No, he would have turned away and moved in the opposite direction if he wanted to avoid you.  He would have taken more decisive action. 

Also the guy was on his own, he wasn't hanging about waiting for anyone in shop, so, unless tired, why deliberately hang about for no other reason, near a girl who may not wish contact with?

He did want contact with you.

Also can a guy act a bit nervous if a girl is dressed totally different than he's ever seen her before, (HOT), his behaviour suggest possibly he likes what he sees, but she's forbidden fruit?...

Yes, a guy has to get used to a woman, if he's more used to seeing her in different clothes.  He will need some time to check her out from a distance in those different clothes.

Could this guy maybe nervous or afraid to approach her, perhaps indicating he was waiting for the girl, or open to being approached by her - going by the body language, shoulders/feet in girls direction...?

Yes, he wants to be approached, he's just standing from a distance checking her out, trying to prepare himself.  The waiting around will make him nervous though.

Also normally would a guy think a girl (who he knows) might not be interested in him romantically, if she ignores & doesn't speak to him, as she walks by him?...

Some guys would, but realistically most guys know that they would walk past a woman they fancy and ignore them if it wasn't the right time and place to talk.

If a guy copies/mirrors a few mins later a girl he knows behaviour -doesn't look, appears confident as he slowly (not quickly) walks by her; does that mean he really doesn't care about her, or he DOES & trying to hide maybe hurt feelings being ignored, when maybe he expected the girl to approach & talk to him but didn't?! lol....

He doesn't have a clue what to say and doesn't really want to interrupt her, if she's busy or doesn't want to talk.  So he's walking slowly past her, giving her the maximum possible to start a conversation.  

Or is he checking her out, walking by her again to get her to:- look, speak first to him, or maybe chase him?

He wants her to speak first, because he doesn't know whether it's the appropriate time to have a conversation with her or what to say to her, to break the ice. 

Does older guys play head games & tease younger women, esp the ones they may actually fancy?

I think that's a too general question, I can't say really.

Also can a guy be trying to make the girl feel comfortable, testing approaching her (not like a stalker), if he knows she's kinda sensitive & shy or spoken to her for along time?

That is one of his aims, avoid looking like a stalker, because indeed he will believe a woman would think this, if a guy was following her around whilst shopping.  This is probably a guys biggest fear, appearing like a stalker and why in a shopping circumstance, he prefers the lady to approach him and strike up a conversation.

Can some guys -esp older men, tell if a woman's completely head over heels for him?

Some guys will be able to.  I guess you could say older men have more experience with women and when you have more experience, you become better at reading signs.  But I still think men have problems, because women are so complex and crafty and good at hiding things and giving off mixed signals. 

And does older guys ever have crushes

Older guys do have crushes like any other guy. 

or forget their feelings for younger women, like, they could last for years?

Not sure what you are asking there. 

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