VH1 Pickup Artist 2 Casting

For the longest time I have tried to figure out what exactly is wrong with me that keeps all females from even giving me the time of day. I know I'm a big guy, but I've seen bigger guys with females. I do take good care of myself and try to look my best when going out to places. I always had tried my best to be friendly and approachable when at clubs, but I've only been laughed at when I ask girls their names. The one time I thought a girl was interested in me turned out to be a ploy just to get me to buy her a drink. Of course being the sucker I am I did. She quickly walked away without saying anything after the fact. I guess its pretty much been like that for me my entire life. I've always been nice to females and have gotten nothing back in return, ever. Lately I have been trying to act like a complete blase jerk, but of course that doesn't work either. I definitely need some advice about what I should do. I'm confident Mystery can help me out, but if I don't get the chance to meet him I'd like some advice from some others maybe.