Help! Boyfriend cheated 😭

My partner of two years I went on his phone one night as I just had a gut feeling as I never normally go on his phone and on there was multiple girls he’d been speaking too asking for sex, flirting etc. So I did more digging whilst he was asleep and found out he’s been on a swingers site posting his dick asking TONS of 40 year old women to come over to OUR house for sex. I was heartbroken he’s been on loads of dating websites such as ‘local fling’ and basically more hook up sites rather than dating sites! I eventually confronted him about it and he was godsmacked that I found out everything as long that he was paying girls online on cam that he’d wank too. It’s disgusting and it sickens me. But he’s done everything to make it up to me but I just can’t get it out of my head, he said he has never met any of these women and just liked the excitement. I sorta believe him but this has been going on for the whole 2 years. Not often but he said he wants to change and that he was an idiot and doesn’t know why he did it and begged to stay with him. I just don’t know what to do as we live together and I can’t imagine my life without him..I adore him..it’s been a week now and so far so good but I can’t help but feel depressed all the time, will he ever change? Has any of you been in a similar position???

Thank you in advance xx