Only fans issue

Brenda

I found out that’s my boyfriend has a only fans and like I knew something was different because he was hiding his phone more and I was “sleeping” and he was on his phone with the blanket over his head. So I went through his phone and I see he spent money of a girl we both know to see her nudes. I told and he was telling me it won’t happen again and he’s sorry. I think this is cheating. Is it? Should I break up with him? Or should I let this slide?