Should I break up with bf

So my bf and I have been dating for 1 year and a half. Recently I’ve got the feeling that he’s hiding something from me. One day I go Instagram and look at who he’s following and it was a woman with a link to her onlyfans in her bio. Mind you , her account is private. I asked him about it and he told me he must’ve seen a picture of her and followed her a WHILE ago. It didn’t make sense to me like how would you see her picture if she’s private. But I let it go at the time. I asked him if he has an onlyfans a few times and each time he told me no. He also said he sees that as cheating. Anyways,then I messaged the woman and she actually replied. She told me her account is only a year old. So he followed her while we were together. She also told me that typically people only follow her from her onlyfans or her tiktok. So I told him and he got super mad and called me insane for messaging her blah blah. I decided to move past it ,, but after that for the past like 2 weeks I just get the feeling that he’s hiding something from me. So tonight I went through his phone. While on his email I found a notification for a subscription obviously onlyfans. I ended on his onlyfans (don’t remember how lol) and yes. There it is. He’s paying women anywhere from 6-20 bucks to see them nude. I’m heartbroken. He’s been lying to me for months. Please,, what should I do ? I really wanna wake him up and end it all right now.