Feelings toward PORN

So my other has been sneak watching porn, first he tried to cheat and it blew up in his face he called me crying right after, I’m very understanding but also a push over when it comes to those I love deeply. So I pushed it off everyone makes mistakes that’s the first in our relationship, but then I caught him trying to message other females on Instagram and fb and so I have his fb log in and logged on my phone so when he gets a message it shows me ‘another account’ notification and deleted the Instagram APP