I need advice !!!!

We were friends for years. Went out 4 years ago for a few months we were young, and I eventually broke it off, we became friends again for years. Last year he got a girlfriend and I got rlly jealous and told him we eventually got together and I was rlly happy. A few months after my feelings started changing and we got distant, I made the worst mistake of my life and cheated, I will never forgive myself for this,we went on a break and ended up breaking up. When we broke up I wasn’t very sad I was living me life talking to other people going out and having fun.A few months after I started missing him so I reached out as a friend. We eventually started being friends again , I started liking him again and told me . He was unsure about getting back together. We decided to take things slow. We eventually started going out again and it was the happiest I have ever been in my life I loved him more than anything, we don’t everything together. We knew everything about each other. our parents were from the same small island. Then the last day he told me his feelings changed over the last 2-3 weeks and he tried to carry on as normal and get his feelings back but they just didn’t. I never noticed him differently during this time he was the same as always. I’m so shocked. He told me he’s sad his feelings haven’t come back and that he hopes they do sometime,and that he will reach out if they do. He said he wants no one else and that he just lost feelings. I need advice he was my best fiend we talked for hours everyday and done everything together . We had so many plans and everything.i believe he’s my soulmate