I can't move on

There's this boy name Jordan that I really, really love and his says that he loves me too but I doubt it because she says sweet things to ever girl to have sex with them. But my problem is that even tho I know that I still love him a lot ( there's no words to explain how much I love him ) and u care about him a lot. Well me and him made a promise to never forget each other and I'm gonna keep that promise forever. But before I knew that he have sex with other girls then me I was so happy with him and the problem was that he was not even my boyfriend and we still did all that shit I lost my virginity with him I was 13 and he was 15. I was so happy that I thought that we could of been a nice couple in till I knew he fuck with other girls I got so made that I stared cutting again ( I had stop cutting for months ) and he saw my cuts and he ask me why are you cutting he didn't knew that I knew that he fuck with other girls and even though I knew I still love with tho.