Relationships

Usually when I'm in a relationship I never go through my boyfriend's phone. I trust them. But this time was different. I went through my boyfriend's phone and I see one girl calling him baby, and he laughing at the text then another talking to him about his style and if she likes him or not. And then he has girls on Facebook, so I told my bestfriend first and ask her what should I do she was like maybe he thought y'all weren't going to be together for long time. So I confronted him about it and he was saying how it was nothing to him and I'm like while are you texting them. They aren't your friends. We argued and then he apologized for it, over and over again. Telling me that I'm right and it will never happen again. Anybody is welcome to comment.