Struggling with sex addiction, can't say no, hard to set limits i mean

So, after my relationship ended a good seven or eight years ago, I started using dating apps and meeting all sorts of strangers. And you know what? Sometimes I end up having sex with them even when I don't really want to. It's weird because if they insist or push a bit, I find myself unable to say no for some reason-I just can't figure out why.

Anyways, it's been about two years sinec then. I've been meeting people and hooking up all the time, not being able to turn down anyone who wants me. At one point, I really tried my best and promised myself that I wouldn't do this anymoer, but somehow after a while, I end up back in the samme old cycle.

A few months ago, I found out I have HPV-I'm getting treatment for it now. But here's the thing: I recently started dating someone really nice again, after such a long time of not being with anyone steady. And despite wanting to change my ways, this urge keeps coming back, and I've cheated on him multiple times without him knowing.

I don't want to lose him-he would be so hurt if he found out-but at the same time, I feel guilty for days after each time it happens. It's like an endless loop of starting fresh and then slipping up again. I'm just feeling really down about myself lately, you know? I need help with this-I don't want to keep hurting him or myself anymore. Can someone guide me through this?