Need Help...what to do?

So my boyfriend and I have been together a few months now and he told me about his addiction early on I was a little confused about it but as he expressed it more I understood. He relapsed a few times in the time we’ve been together I try not to get mad but it’s more of a hurt I know it’s has nothing to do with me not satisfying him because it’s just disappointing that I have more confidence in him than he does himself. The last times he relapsed he was around 2 weeks then it was a month in and he still relapsed he promised he would make it to 3 months and I believed in him but then he keeps letting me down. It’s worse because he had urges but didn’t relapse but then the next day he relapsed after saying he was going to put restrictions so he couldn’t see anything then he tells me he relapsed. I know it’s a process and a journey but I just don’t know what to do or if I can do this I’ve asked if we need a break so he can go 90 or however many days but he said no he can do it but I don’t know what to. Like am I a trigger or something cause he said he’s done 300+ days so I’m trying to see what’s different this time cause he said he was in a relationship when he went those days. I don’t want to seem insensitive because I’m not I do everything to makes sure he succeeds but he still relapses can someone give me some advice? Maybe a spouse who has or is dealing with this