1)The chance of getting a gf mostly depends on your attractiveness, but even if you're not the best looking guy, you can still fix yourself and get a hot gf with a thick ass
2) Be more open to other people, if you end up on some kind of party, don't just sit in the corner, talk to people, of course you won't get anyone good if you don't do shit to get someone
3) Try to use Tinder or some shit like that
4) Don't fall for bitch ass girls who want to steal all of your money and break your heart. Even if they're cute as fuck, you'll make your situation only worse
5) Stop being shy, it won't get you anywhere
I have a girlfriend for almost 4 years now, and my advice to you is to ask yourself if you really want a girlfriend. In my opinion, it's not really worth it.