Hold on a minute, I had my coffee. Now I had think... sort of. You started this relationship at 14! You thought you were a woman then, but honey you were a little girl. You moved in together at 16, now you're 18 and smarter and wiser. I'm suprised your parents didn't kill him (they must be second generation)
But now you have to think hard about your future, because he's lost interest. It happens to the most beautifual, most inteligent woman... it's not you, it's him. Get some counselling so you can think clearly. Invite him if you want to make it work. It was good while it lasted, you have your whole life ahead of you. Go to school.