A bit late but this happened to me recently.

A bit of background: I have very little game and can come across as a bit shy with people I don't know. The last time a girl told me I had a cute smile the only thing I could think of to say was "thanks". I have a GF, but it's a bit odd to drop that in conversation with strangers without seeming presumptive. Obviously I could have just struck up some normal conversation but honestly, getting randomly complimented by a girl who I'd never spoken to caught me off guard, it doesn't happen very often.

Anyway, I live in a sleepy village in England. I was on my way back from the chippy were this giant bloke (probably about 10 years older than myself) asked me for some info on the shops in the area. I somehow got locked in conversation with him, he was nice enough but honestly, I just wanted to get home to eat my dinner. As I'm about to finally leave he suggests that he takes my number to meet up sometime. Ah. I'd got slight gay vibes from the bloke but honestly didn't realise that I was subconsciously flirting with him. I think this would have been the moment to say "thanks, but I'm not interested", but once again I'd been caught off guard and sort of muttered "errr oh OK then". Luckily he'd forgotten his phone and so suggested that I took down his name and number instead, which I did, just to be polite really, and I guessed that saved an awkward phone conversation at a later date.

I guess I was flattered. It's always nice to get attention, whether from a man or woman. Thing is, generally speaking men aren't used to it. Certainly I'm not and I still don't know how to respond to it without coming across as a prick or extremely socially awkward. I mean, I guess there would have been nothing wrong with me saying "sorry I'm straight" or "sorry I have a gf" but I, like most men, am rubbish at reading when people are hitting on me and find that a bit of a presumptive thing to say.