| [19F] forgave my boyfriend[23M] after he cheated on me. I just don't know how to set boundaries after the

So I recently discovered my boyfriend (23M)was texting another women from across the states. Which he was emotionally and romantically involved with for about 3 weeks. To go as far as sharing inappropriate photos with each other. After discussing it for a while we decided to stay together But I don’t know how to set boundaries from this situation without sounding crazy. Because he recently made new friends with another women and it seems friendly but I’m trying to find everything in me to trust nothing will happen. But apart of me had this feeling that I should say something about this new friendship because she seems overly attached to my partner.

I want to trust that nothing will happen but I want to set boundaries with this new friendship of his without sounding crazy?