Then get a girlfriend jesus christ.
You're a sick person.
What the hell is wrong with you? Did you wake up on the wrong side of your period? It's not like I sit around jerking off all day. A couple thousand years ago people forgeted like monkeys as soon as they hit puberty, being fifteen is a lot of hormones but not quite an age where you're having love. The result? Masturbating. I don't know what your big hang up is; the overwhelming majority of guys have masturbated at least once.
Also: "get a girlfriend". Wouldn't that be great. Stop making it sound like with any modicum of effort I can get a girlfriend. Maybe it's that easy for some guys, but frankly, I don't want to be in a relationship with a girl that I just walk out and get.