How to win back my Ex-Fiance?

I am looking for any advice on how to win my ex fiance back. He broke up with me 2 days ago and it is destroying me inside. A little side history. We have known each other since we were 8. We started dating a little over a year ago now. He is in Nuclear Power training which is considered to be the 3rd hardest military program in the country I believe. (he is in the U.S. Navy). We were dating long distance for about 4 months when I quit my good job, put my stuff in storage, and left all my family and friends behind me to be with him across the country. We have lived together ever since. He proposed back in February. We have our problems but honestly the reason we have problems is because he doesn't communicate completely. He leaves his stories and explanations short which causes me to think things that he doesn't really mean or do and not know if I can trust what he is doing. We broke up because we had an argument over him hanging out with his friends. Its not that I don't know he needs friend time (even though my life now is waiting at home for him to come home and I have no other life anymore or friends myself) I just was upset because I was feeling second best to everyone else. He works sooo much WE barely get time together. He broke up with me about 4 times. He denies it that he broke up with me multiple times. When I ask him why he doesn't want to be with me anymore after we were perfectly happy the day before (he told me how much he loved me and how happy I really made him) he can't honestly give me a reason I find valid. Everything he lists is stuff that he says I do not do which I do do. He goes back and forth between realizing it and then saying that I don't. I told him honestly if I wasn't doing enough of the things I was doing to make him happy he should have just told me he needed a little more instead of breaking up with me. I now am heartbroken. He doesnt want anything that reminds him of me. He wants me to move asap. He plans on pawning my engagement ring. He took back the sound system he bought for me when he proposed. He says he still loves me. And I know that it is true because I catch him still giving me the little looks he does when we are good. We fought pretty bad at first but now Ive avoided fighting or arguing about anything with him. I do everything he asks and offer to do even more. I try and hide that I am falling apart inside because I know it only pushes him away more. He is the type of person who is very stubborn and very closed minded to other input that isnt the same as his. I try to come to middle grounds with him and he doesnt try with me. He has a power issue and I feel like a couple of the times he broke up with me was all so he could feel powerful over me and see me crying my eyes out and begging for him back. So what can I do? How do I get my ex Fiance back for good? We were planning on getting married very soon and having a family ect. So I know that can't be completely wiped from him already so what are the ways to win someone like him with this situation back fast before he moves on?