I just want to describe the nature of an addiction for you.
When you first try something like a drug, or in this case, sex, it gets you to a high and it makes you like it. But once it's gone, you get to a low that makes you miss the high so you do it again only the high isn't as great as the first time you tried it. So you do it more and more to try and chase that original high you felt but it's never quite as good and the low continues to get you lower and lower. Eventually, you're doing it just to feel normal and escape the void you feel when you're not at your high.
This is the way that addictions work with anyone. Some times it's helpful to understand what an addiction is. The only way to counter an addiction is with self control. You need to acknowledge your addiction and set rules for yourself to live by. Over time, if you don't feed your addiction, it will level out and your natural state will feel more normal. I'm not saying don't have sex. I'm saying that you should do it in moderation and only under circumstances that you control, not your body. It will require resisting urges which can be challenging but are easily accomplished with self control. As Jock said, a hobby is probably a good idea. Something that requires you to practice a kind of discipline, like martial arts.
Sex is healthy but there are always risks of contracting an STD. It is essential to take steps to protect yourself. That way, if you continue to be sexually active, you don't end up passing on diseases to others. You also don't want to be an early mom. You should make sure that you're ready to have a kid before you get surprised with one one day. You should for sure look into getting on birth control but it might be a good idea to talk to a doctor about what you can take that will have the least impact on your developing hormones.