Best friend vs baby daddy

I don’t want to make this too long so I’m cut it short . So basically after my daughters father and I broke up bc he cheated on me , this happened many years ago I forgave him and we continued to grow our relationship and it’s getting better but . We even talked about getting back together I know it sounds horrible but we are both 2 different people now . He is still in

I recently started hanging out with his ex best friend I’m not sure why they’re not best friends anymore I hear two different stories when I talk to both of them about it . My ex found out I’ve been hanging with him and he’s very upset , my ex said in order for us to work on our relationship . My daughter is really close to him bc that’s her god father and he helped me get through my break up . I don’t know what to do 😅

DISCLAIMER : when I say we just hangout we just hangout there’s no romantic feelings he’s just a really great friend . He has a girlfriend I am really close with .