Who We Were Back Then

I thought he's the one. I thought our relationship would be strong. He told me to fight for our love, and I did. But what did he do? He just gonna break our vows with some other girl. And now he's back after 5 years, he wanted me back to start over again. Who do he think he is? I'm trying to move on with him, but I still have a bit of feelings towards Bonbon. I don't know what to choose, is either "get back to him and start again" or "let him go and be free".