Is it normal that i'm intimidated by my boyfriend watching porn even though....

I've been dating my boyfriend for almost two years. At the beginning of our relationship, I never considered pornography to be an aspect in a relationship because it's something I had never experienced before. I didn't know he watched porn until maybe four months later.

At first, I was extremely pissed off. We have sex almost every single day and it bothered me because I felt like I wasn't good enough, (even though he tells me every single day i'm the sexiest, most incredible girlfriend in the world.)
It still bothered me.
He of course continued watching it because I didn't want to stop him nor did I confront it. I know masturbation is healthy and I know he's learned quite a bit from those videos, but I still couldn't help but getting upset.

6 months into the relationship we moved in together. Then he started to delete his porn history. I got even more upset. Now he was hiding it. I also understand it's personal and probable that the subject can cause a huge fight.

Just recently, he brought the subject up and told me that he does watch porn, he likes looking at other woman for fantasies and masturbating purposes, and it has absolutely nothing to do with me. I had already accepted it in the past, but I kindly asked if maybe he could not delete his history...
A. So I might be able to see what he would like.
B. I'm a little nervous about live webcams and that's something I couldn't ever accept.

Now he leaves his history up, and even though the feeling passed mostly, I still get a bit jealous, intimidated, and upset. Can someone PLEASE help me get rid of this?