Boyfriend might have a sex problem

Ive been dating my bf for 4 years now and i love him a lot. But i recently found out he masterbates everyday (even days we have had sex). We havent been having sex as much the past few weeks bc we have been crazy busy and our schedules with university, work and extra curriculars have just been crazy. But otherwise we have sex 1-3 times a week and he has never complaining and always tells me how good it was after. Anyway he just told me that for a very long time he’s been masterbating everyday to either pics of me, porn or girls in instagram. I am just so uncomfortable with all if that. And i just dont know what to do now. I know he loves me. He tells me EVERY single day he thinks I’m beautiful, he loves me, my body, my personality etc. He tells me many times a day. I dont want anyone here telling me to dump him bc sorry thats not an option. Other than this issue he his amazing.

Just hearing this stuff a few days ago has made me super upset but i dont want him to feel bad about it bc he feels sooooooo bad about it but doesnt know what to do.

I want to be there with him and he wants to cut down. He is just very sexual and i have a very low sex drive. Having sex 1 time a week or every 2 weeks is fine with me. Honestly sex also kinda freaks me out. The idea of doing that kinda stuff with another person is something I’m simply not comfortable with. But that is a personal things, I’m very uncomfortable about myself, my body, my desires etc. And I’m working on it but its a long road ahead. I like having sex bc i like being close and intimate but he wants to have sex bc he likes the feeling. And hearing that broke me heart.

I just so badly need advice. I would never talk to my friends about this bc they all know him pretty well too and i dont want them thinking anything bad of him or judging him.

EDIT:

Thank you everyone for your replies. I just want to emphasize, the problem is more so that he is looking at girls in insta and all this when masterbating, not that he is masterbating. I’m ok with him masterbating but not to these girls on insta. And a while back i wasnt comfortable with porn either but I’m almost there but instagram is for some reason something I’m not ok with. I’m sorry if that doesnt make sense but its where i am at. Ive kind of gotten less comfortable with him watching porn since learning this other stuff about him. I know its not fair but its where i am at