Dont know what to do

Long Story:

I met my ex-girlfriend during my Sophomore year of college, she was a freshman. I knew I would end up with her the first time I saw her the first day of class, and I spent the entire semester wondering how to approach her. I finally had the nerve to talk to her one weekend and we hit it off immediately. It lasted for 2.5 years and we both were very much in love with each other. We had to go through parental disapproval for the last year of our relationship but I was 22 and she was 21 and we figured we were old enough to decide what we wanted for ourselves.

2 months ago, she all of a sudden breaks up with me. She was devastated and it took nearly an hour for her to finally let me know that she was breaking up with me. I was crushed but finally agreed with her decision. We spent the weekend away from each other with limited contact. The following Monday while at school she comes up to me and tells me she is not sure if she made the right decision. We decide to take things slow to see what happens. For the next 2 weeks we spend time together like were still dating and everything seems alright. Exactly 2 weeks after we break up, she invites me out to dinner and we end up spending the night in a hotel room. It was great and we both decide that its something we dont regret and we wanted that night. The next day she tells me shes going out of state to visit a male friend that she doesnt know too well, he had asked her to come visit and since we were on spring break at the time she decides that it could be fun. I was upset from hearing this. Apparently they bought the plane tickets 2 days before she and I spent the night at the hotel. I was crushed even more and accused her of going to be with him. She gets upset and says that she would never do that to me and gets angry because I am making it seem like our relationship was fake. We later reconcile and she assures me that she doesnt want to be with him. We spend the last week before she leaves going out on dates and spending time together. We even made plans for when she comes back, even a romantic dinner date. So I spend the entire weekend thinking about her and what shes doing with this guy shes visiting.

When she comes back, she all of a sudden doesnt want to talk to me anymore and I have to find out from a friend that shes dating this guy now. They live 900 miles apart and will rarely see each other that much. I was crushed yet again and instead of confronting her I just went NC. She initially tried to meet with me and talk the first week she came back but I never responded. We spend the next 6 weeks not talking.

Eventually one of our mutual friends goes out to drinks with her and I guess she asked how I was doing and stuff. My friend asked her why she moved on so quickly and she couldnt come up with a good reasonn. He assumes it to be a rebound relationship. Apparently she told my friend she isnt completely over me. A couple days later she emails me and says she has some of my clothes that she wants to give back. She asks me out to coffee and I agree.

Coffee was great and everything was friendly. She tells me that she misses me and isnt completely over me. She says that she has a void in her life because we went from spending so much time with each other to not talking anymore. I tell her I got accepted into the Marine Corps Officer School and she starts crying. I dont ask her about and we leave on good terms. BTW, the clothes she gave back to me were old t-shirts I gave her because I didnt wear them anymore and was about to throw them out, but she wanted to keep them.

We see each other at school after having coffee and she goes on like everything between us is alright. I get upset by this and ask her to meet up. We meet and i express my real feelings to her about all of this. She gets defensive and we start to argue. I confront her about what she said about missing me and not being over me and she retorts by saying I know I said those things but I really meant to mean this and that...and tries to take back what she said and tries to reiterate their meanings...which i dont buy because she had told 4 ppl the exact same thing she told me. Apparently her new bf knows she isnt over me and is somehow understanding. So we argue for an hour and eventually part ways.

I see her again a couple days later and she gives me a nervous smile and says hi but I dont acknowledge her.

she later emails me a quote from the Jeff Buckley song Hallelujah "love is not a victory march"

and I havent talked to her since.

So is she rebounding? being selfish?

I'm so confused by all of this....I leave in a few weeks for the Marines...So I guess we'll see what happens