Not enough sex

So my s/o is not very sexual. I get that, I’m not super sexual neither but I do like sex 🤷🏻‍♀️ more than he does. We have sex twice a month and I get so upset because I want more. I’m not saying every day but maybe twice a week? Well, the other day we got in an argument because I caught him on only fans. He was messaging 1 girl and asking for pics but didn’t get any because he didn’t pay. And I know he watches porn when I’m not home and he is (which isn’t often) and he masturbates sometimes. Every time we have sex, it’s great. And he assures me that he loves my body and loves the sex. But I’m not getting enough and I let him know, yet he masturbates to other naked women or other people having sex? I didn’t have a problem with him watching it like if I was on my period but now I do because I don’t feel that we have enough sex.

No, he’s not cheating on me, I know that for a fact. And yes he loves me, he shows me every day In other ways.

Should I be upset?

Is this normal?

I know some people have low sex drives but I have never experienced it with a partner. In the past, My partners usually wanted to have sex every day if possible. Not comparing him, it’s just new to me.