Man, I'm telling you, I see overweight guys gettin girls all the time.
The thing I've noticed most commonly is if they have 'swag'.
It sounds dumb, but you need that shit.
The way you dress, walk, talk, and act affects the way a girl will think.
Have confidence. If a girl looks interested, go and talk to her, get her number, call her up, do something.
ALWAYS make them laugh. That's a good idea.
Well, that's about all the advice I have. Good luck stud.
EDIT: Girls aren't going to come to you all the time. Hence the term, "GET SOME".
The right girl will come around. Good things come to those who wait.
ALSO, you must start getting in shape nig.
I was born lucky. I have good looks and so do a lot of other guys, and girls aren't that hard to meet. But if not, if you feel ugly, then you must do what we are recommending.
Also, don't always try to go for the hottest girl in school, go with what's in your league.