I know it's super hard especially when you are younger but you have to be OK with yourself first. When it comes to dating. I've seen a picture of a big fat guy having a blast at a party and his shirt says "yeah I'm fat... Let's party" that's the kind of attitude you've gotta have. I know it's not easy and sometimes you gotta fake it till you make it but letting the world know you are OK with yourself first gives you the best chance.