What should i do about my ex?

ok so me and my ex dated for about a year, we broke up about this time last year. We went on and off talking, not talking, talking again, not talking. And were finally really talking again. I am a senior in High school and she is a junior. She is a really talented lacrosse player and is away every single weekend for recruiting at colleges all over the country. We have been talking for the last few weeks and she doesnt feel like she can be in a relationship with me, let alone anyone right now. I have wanted to get back together with her kinda badly lol. She just says shes too busy and shes under a tremendous amount of stress b/c in all honesty, her parents push her way too hard. Tutors, and afterschool stuff, and lacrosse. She never seems to get any time to be a normal teenage girl. Last night she came over to my house and we had sex. We lost our virginity to eachother and like it was the first time we had done that since before we broke up a little bit over a year ago. After we finished she turned over to me and said "this doesnt mean were dating." Now i didnt get upset or anything, because i knew it didnt mean we were back together. But, i have done a boatload of stuff to get myself figured out and turn myself around from the time we broke up, to where i am now. Its like i am a totally different person. She has been or has hooked up with one other guy recently but i think our relationship is much stronger. We talk like we are dating and we say i love you and all that relationship stuff. But she doesnt want a relationship right now. I know i should be happy that we can do these things yet i can go out and talk and do things with other girls because thats every guys dream. But, i dont want that. I want her. And i cant figure out what to do now. Can you guys help me figure out what i should do, or what happens next or anything...could use some help...thanks to all!