I went on my boyfriends phone and saw he was logged in to his old Facebook on messenger. He told me he doesn’t use it. I then went on his messenger out of curiosity. He was messaging his ex gf and her to forgive her!!!. We have a 4 week old baby boy. We’ve been together for almost 21 months. I just want to know why hes apologizing for and what conversation they had together. And why would he delete messages? Ladies what should I do??

EDIT: his excuse what that he was out drinking with my brothers (bfs not 21 yet) and got so drunk that he decided to text his ex but doesn’t remember what he said to her. He decided to go out while I am home taking care of the baby. I’m furious with my brothers as well.