What should I do about this girl?

Well, last summer this girl texted me at my lacrosse games and I started testing back and it developed into a relationship. The only thing was that she was moving to go to Virginia later in the summer. And I didn't want to by get hurt by a cross country relationship. But after she moved we tried to keep it as strong as we could. But we both agreed that since we were on other parts in the country that if we met somebody else than we were to free to pursue them. But I was too much in love with her to go for anybody else. About 2-3 months after summer had ended she said she had met another guy. They soon broke up and she met another guy. They had broken up recently as well. I am still madly in love with her. She says that if she were here again with me then she would try at a relationship with me. She says she will "always have a place in her heart for
me" since I am her first love. She also says that when she comes back to visit during this coming summer, she might want ti try again at a short relationship while she is there. I don't know if I should stay in love her and never give up on her and wait for her even though she is so far away and it will be so long? Or if I should be trying to get over her as hard as it may be? What should I do?