What’s y’all opinion ?

So my bf /Bd has texted other females on instagrams I didn’t know about ( he sued other names ) so ended up knowing because I used his phone to sign up on something and some Instagram link showed up so I was confused . I logged into the Instagram and found messages of him telling other females That he missed them and wish he was their bf instead of the one they had. ( this happened when I was 14-16 weeks pregnant ) (now I’m 33 week ) I also found out he had another Snapchat . Now he has made an Instagram has given me the password and everything but he only follow naked bitches and I’ve told him that I don’t like it that that’s disrespecting me and this is his answer ( I’m not doing nothinggg )

That’s his Instagram and full of that shit . And honestly idk what to do anymore . I’ve tried telling him to delete it and he gets defensive