Breakup HELP ME

Ka
Me and my s/o of a year and a half broke up about two weeks ago, this was because, while we were together, he took my virginity, which I waited a long time to have someone take, and after sharing love, he lied and said he was going to his friends and went to another girls party. So I forgave him, but he kept lying and going to see that same girl, while we were together. So wanted short break to collect my thoughts. Now he doesn't want to get back together, and it is literally killing me, I feel like he maybe just used me for sex? so I've been very sad.. I'll text him and it's like I was never once his girlfriend. He won't ever text me first. I tell him that I love him and he says he won't say it back. I just don't understand what happened. Also he told me we wouldn't work out because I leave for the military in August... I'm so hurt how do I get over him? I'm so tired of being sad, and being sick in the stomach, and up late from it. PLEASE HELP ME move on from this!  Someone please help me.