I want to add to what @Anemone said. She spoke of “ramping up” your emotions and “drama.” I think that people have an awful lot of negative connotations to the word “drama,” so I prefer to talk about “intensity.”
When we feel very strongly about something, it feels like we matter. Our lives take on some added importance. If we feel this strongly it must mean something very important. That’s a feeling we can get addicted to. It makes our lives feel meaningful, and we can’t get enough of that.
You would think that the up and down would make you want to give it up, but in fact the down is just as good as the up. Both are intense and both make us feel like what we are doing is the most important thing in the world.
This is not just a teen thing, either. It happens to people of all ages. I’ve been ailing from that addiction for a few years now, and I’m over 50! It’s a kind of craziness. When we feel it, we can’t think straight any more, and it is the hardest thing in the world to give up because it feels like if you give it up, you might as well be dead.
There are things you can do to help yourself come to your senses. These things, however, are not often available to young people, either because they are too hard to understand or because you just don’t have an opportunity to learn them. However, if you can do yoga or meditate or dance or learn an instrument or anything that really focuses your mind on something very specific, then you will be able to learn how to let these intense feelings pass through you without having them affect you so strongly. Then you will be able to become more detached from this need for intensity, and you will have an easier time letting go of this boy.
I don’t know if what I am saying will make sense to you, but if it doesn’t, please ask questions. There are books you can read, or tapes you can listen to, or probably places online where you can learn about these techniques by watching videos and what-not.
I truly wish you well. What you are going through can be dangerous, and is probably quite painful in between the times it is euphoric. Like I say, I’ve been there. It’s not just a girl thing and it’s not just a young person thing. It is a very seductive feeling, and I can understand why you stay with him. I hope that understanding what is going on inside you—how humans are built to feel these things—will enable you to become less enamored of it and to pull back from this roller-coaster life.