I don't know what to do, what do you think?

Okay, I'm dating this guy (Colton), but there's another guy who likes me a lot(Devin). Well, before I started dating Colton I was ddatiing Devin. Devin broke up with me and dated my bestfriend. I was really depressed. That was like 3 months ago. Now, I'm dating colton and Devin likes me. Well, Colton always calls me stupid and stuff. He says he's always kidding, but I never really get to talk to him since he don't have a phone. So school's the only time. Devin swears he's sorry and stuff, but I don't want him to do the same thing he did to me last time. He's so sweet and stuff, but I love Colton to much to break up with him. I don't know what to do. I like them both. What should I do?