This is my first time posting so I apologize I’m advance..

My bf of 3 years has a second twitter account that he uses for porn. He shared this a couple months ago and I didn’t think much about it as I thought it was okay for him to watch it plus we share our phones passwords. We had a fight on Saturday and for the first time I asked to check his phone and opened his twitter and see him replying to nudes of pornstars and OF guys tweeting them that he wants them now and even DMs them. some of the post where like “retweet if you want this” and he will reply “where” and that makes me feel like he cheated. He says it’s nothing and didn’t get defensive at all he said it was wrong and that he won’t do it again and reminded me that he never lied about the account which it’s true but he didn’t tell me he was engaging with people letting them know he wants them. Another post was about ass eating and how he wanted it which i find odd because he’s never let me do it to him. Idk what to do I feel like it’s cheating because he was engaging. I’ve shared with how I feel and he says I need to let it go so we can better but I can’t stop thinking about what he did. I want to admit that I’ve masturbated to porn but never messaged anyone.