Why is that every girl I meet chooses another guy over me?

The two female friends I have now have boyfriends, and I'm 23 and yet never had one in my life or any friends to hang with more often because of my piece of **** autism and bipolarism, I try being a nice guy but the girls I come across only likes me as a friend I swear I ******* hate this, it seems being a nice guy doesn't do **** at all maybe its time to an @$$hole to everyone my that will help