What should I do, I'm confused?

Why does this happen to me. Quite alot of guys have shown intrest in me (well I think) and nothing ever happens I'm still single. Why is this, ?? One reason I think this is because a guy for instance offered me a lift home from a gig which happens to be my bros friend but I would of said yes but I said no because I was with my friends and couldn't ditch them. He seemed intrest or maybe he was being nice . Nothing has happens since between us. I'm confused should I go to his gig In a couple of weeks and just see what happens if so how should I act?? Considering my bro will be there and he doesn't know he offered me a lift?