Boyfriend "watches porn thinking about you"

Okay so, I personally dont like porn. Not that i am opossed to it, people is free to do what they like but... My boyfriend just told me he does watch porn but he "only cums thinking about me". And I couldnt help but to feel kind of weird knowing he has to use the help of strangers having sex on a screen even though he sees me naked often, and he has recieved tons of nudes and intimate videos of mine. So I feel kind of confused. I was honest though, he knows how i feel about porn. So i was open and told him i didnt quite feel as excited as he might thought i'd be by telling me that. I feel kind of uncomfortable...and frustrated. And then he felt bad and said he shouldnt have told me this. And i said i was sorry if i made him feel bad, but i had to be honest, i do not feel aroused by that behavior. What? Should i keep that to myself? I believe i had to be honest. I dont know... I feel really frustrated. Am i not enough?