He actually never denied it.

When we were just starting dating, he confided in me that he used to have sex with his previous girlfriend and immediately after he'd feel the need to watch porn. Later on in the relationship, when I brought that up, he said he doesn't remember ever telling me that. I don't know what's up with that, but now I know it was a huge red flag - because he ended up doing the same thing with me.

The first time I caught him he promised me he would never do it again. He promised to stop cold turkey.

But then we stopped having sex altogether, and I caught him again, and he told me himself he thinks he has a problem, and that the only reason he hadn't been to a therapist was because of money.

So I found him a cheap therapist and he hasn't had any problem with it. He's had two sessions so far and he says he's liking it.
But then again it's only been two sessions, so it might be too early to tell.

Unfortunately we have plenty of other problems aside from the porn thing.

The one thing I'm happy about is that he doesn't deny he has a problem, and he let me help him find help, and he hasn't shown aversion to any of it.

I'd be seriously worried if he denied he had a problem and refused to seek help - that would tell me I'm stuck in a relationship I will never be happy in or have my needs met.

I am also sorry that you're dealing with this!
My ex watched porn compulsively. It made me feel disgusting, and I felt much better leaving the relationship.

I hope everything works out well for you - whether that includes your boyfriend or not.

Hugs.