My boyfriends obsessed with watching porn

My boyfriend and I don’t have sex very often, and when we do he isn’t very interested. We’ve been dating for 2 years now, and throughout our relationship I’ve asked him multiple times if he watches porn, and each time he told me no. Normally I wouldn’t care if he watched it, but it’s taking a toll on our relationship. I found an unbelievable amount on his phone. He was in chat rooms, looking up local women to fuck in the area, and I confronted him and asked him why he lied and he got really mad and defensive. I dont know what to do. I feel so gross and betrayed. I love him so much but I think watching porn has set new expectations for him that I can’t meet.