How can I get a girlfriend

So im 15 , rather short ,i have blue eyes and dark wavy hair . I'm a bit chubby but go to the gym 5 days a week . I play guitar and ...

So im 15 , rather short ,i have blue eyes and dark wavy hair . I'm a bit chubby but go to the gym 5 days a week . I play guitar and tennis . For context in Germany people my age often go partying and drink, so that's not me, I don't drink smoke or anything like that , I'm not very confident cause is used to be bullied. So why can't I find a gf. I have girl friends and they lough at my jokes and stuff. But one of them thought I was gay with I am not.