Bf 36m me 32f

My boyfriend and I have been seeing each other for about a year. We don’t live together. Things have generally been good between us—he’s always seemed very loving and caring. However, some time ago, I discovered that he has a second life.He had been in a long-term relationship, which he left for another woman, and then he started texting me while still with his ex. He claimed they had already split up, but she was just looking for a place to move out of his at the time. I believed him. I didn’t take it too seriously at first, as I’m generally cautious, so I was still living my own life and keeping my own place.
Later, I discovered that he’s a sex addict and occasionally uses coke. I found out he’s into older women, has had loads of ons, and that while seeing me, he slept with a 55yo woman a few times. He also had another sex buddy who was willing to come over whenever he wanted.

When I tried to walk away, he cried and begged, and I stayed (I know). Then I found out again that he had done coke and picked up some girl at a pub—he claimed they didn’t sleep together, but I don’t believe that. It seems like every time he does coke, he becomes desperate for sexting, sends/receives tons of nudes, and often ends up sleeping with someone. Every time it happens, he begs for help and says he doesn’t want to be that person.

The scale of this is beyond my understanding. He’s always been flirty, and I knew that—but this? The other day, I found out that when he does coke, he also becomes bi. I found old conversations (before my time) where he talked about finishing in his gay mate’s mouth and returning the favor by wanking him off. He also watches a lot of porn.

In the past, when I confronted him, he cried and said it was just sexting and he never cheated. He always tells you what you want to hear. I later discovered he had multiple sex buddies during that time, recorded videos of himself sleeping with them, and even shared them with his mates

I can’t understand how he can be so caring, tell me he loves me, and yet be so broken and deceitful at the same time. What is wrong with him? Is he fixable? Is it the coke, or is this just the kind of person he is?

Once, he texted me how much he loved me and said it almost killed him knowing how much he hurt me—and that very same night, he did coke and had a fuck buddy over. I was there the next morning, completely unaware. I think his ex didn’t care what he was doing because she was always away. But I did care—and that’s when I started to discover the scale of everything. It looks like he had never been caught before so now he acts desperately when I confront him

He even went to our friend’s family party. I couldn’t make it, and later found out he gave a ride to the auntie’s friend who gave him a blowjob afterward. He has a talent to talk women into sex, takes him minutes.

He keeps crying and begging me to help him. We’ve been very good together, we laugh a lot, and genuinely enjoy each other’s company. But I just can’t process how he can be like this when nobody is watching.

TD;LR sex addicted bf cheating after coke and is begging for help afterwards. Is he fixable?