Porn effecting our sex life

So my boyfriend agreed to stop jacking off to porn because it was actually effecting our sex life. He wouldn't want actual sex for weeks and weeks on end. And I have a high sex drive and don't personally like to masterbate. So for the past few months everything has been great, I felt like our entire relationship was getting better and stronger, but last night I knew something wasn't right. Then when I tried to initiate sex he said "it's not gonna work." And of course he couldn't get hard. I know he was jacking off to porn again but he won't admit to it. So he's just cool with lying to me. He's just flat out not caring that my sexual needs aren't being met because of him. And it does hurt he's lusting over other women, in my mind that's cheating (since it's effecting our sexual relationship) and I made that clear to him and I thought he understood. I feel like this is just going to continue again and I need help.