LOL its too late for you. If you aproach a girls and its not working then look at yourself - maybe you have to change something about yourself. Actually you still could get her eventualy but you are too stupid for that.
Instead of harrasing people who dont like you you could give them your best - show your positive side, try to understand them. Its much easier to deal with person you dont like when you understand the person.
Instead of giving up on girl after rejection you could come back better and better until she wont have a reason to say no. Sometimes when person treat you bad and expects you to respond the same way you can instead catch them of guard and do something good instead. Love is much stronger than evil.
But like I said - you are too stupid for that.