My advice is to try and "center" yourself. Yeah it sounds stupid. But I had so much frustration with this, I didn't actually start improving until I stopped myself and thought about it. Be an optomist...know that you're not alone, and the reason why you don't hear about this much is because people are ashamed too. They lie ALL the time about relationships. People won't admit they've never had a boyfriend because they are afraid of being judged. Just know that you can get better, some people are late bloomers.
Now with the kissing thing...this may be wrong, and I'm not reccomending it at all, but when I wanted to kiss someone, and I was tired of feeling like I was judged, I just went to a party and got wasted and just hooked up there. If you're a bad kisser, blame it on the beer. ha that may not be right, but that's how I did it. You don't wanna get caught in a bad situation.

Keep a book and vent into it when you're upset, I know its hard to start late because you're expected to be experienced by the time you're 16. But everyone's situation is different...and now I feel a lot better, I'm going out on dates and not caring so much. When you get into the swing of things everything will be so much better. Good luckkkk!