He dumped me out of nowhere

Being in armed forces as a Military Cop isn't easy especially trying to find someone who is supportive and can handle it. He found that with me. We had been dating for 4 months and everything was fine.

He got posted 3800 km away from me and he told me that when we first started dating, I fell in love with him. He moved at the end of last month to his posting. We were fine he showed he cared, still put me in his future plans then he dumped me yesterday. I was suppose to fly out and see him at the end of May.

He told me he just didn't feel the same way anymore. I don't get how a person can go from seeing a future with someone then taking a 180 to not feeling that anymore. I'm so lost