Porn is ruining my relationship. I need help (no judgement zone)

Okay so long story short my boyfriend and I have been together for over three years and we have a four month old daughter. From the beginning of our relationship I always told him I looked at porn as a form of cheating (don’t judge me, it’s just how I feel) and he constantly said he understood and respected that.

Then the time came when I was about 6 months pregnant (and at my most insecure) I found a bunch of porn in his phone. We had a huge argument over it about how I felt betrayed and heartbroken because in the end, it felt like he had cheated on me. I ended up forgiving him and we moved on.

Now that our daughter is four months old, I’ve been getting suspicious that he might be watching porn again (or he never stopped and just hid it from me). I ended up doing reverse psychology on his ass and made him admit to watching it.

So now I found out that he was still watching it KNOWING I saw it as cheating as watching how heartbroken I got the first time I found out. Idk what to do☹️ I feel like he doesn’t care about my feelings enough or he would’ve thought about me and remembered how hurt I was the first time. I don’t wanna leave him because we have a daughter together and that’s not the type of house hold I wanted to raise my child in. And frankly if I told anyone I broke up with him over porn they’d never understand. I feel crazy but I can’t neglect how I feel and he knew I felt this way from the beginning and still betrayed me for the second time.

Please be supportive. I need help on what to do.

EDIT: something I didn’t add is I’ve given him multiple opportunities to tell me himself, when my suspicions came about I asked him multiple times and he refused to own up to it each time. Months went by and that’s when I’ve had enough of the lying and I felt I had no choice but to lure him into confessing. Saying “I wouldn’t be able to deal with someone like you” is a bit rude if you don’t know the entire back story.