Most Helpful Guy
A few issues here... girls can easily give off a vibe of 'Don't even dare approach me' that's not a bad thing... very rarely do decent guys approach girls in clubs. It happens! But most guys in clubs know they are wanted by girls and they therefore don't worry about rejection.
Another issue is that I don't know you, but from what you've written it sounds more like you haven't liked anyone that has approached you... not that you haven't been approached.
I also haven't seen you so I can't comment on your attractiveness. I think either your standards are too high and stop looking for a handsome guy... and look for a genuinely nice guy. Or just smile a little more and catch guys eyes. If they do look at you... to actually talk to you, you need to give them a signal. Usually prolonged eye contact at minimum. A wink and cheeky smile would have them approaching you.