Not wanting to have sex isn’t a red flag in and of itself, but your updates certainly show him as being full of abusive traits. The Madonna-whore complex is real, google it.
What about any of this would be good enough to “sacrifice” a part of yourself? The fact that he’s never had a relationship and worships his mum is a red flag. The fact that he thinks he has ANY business calling any woman a slut, is terrifying, and the fact that he only talks about himself makes him either a massive bore (which is bad enough), or a narcissist.
The control around you and what you do and how you have sex, is the biggest red flag ever. Would you really accept that going forward, just to be with him? He sounds like he had no redeeming features, so why are you even giving him the time of day?
You say you’ve had some bad relationships in the past, I have to say you’ve jumped out of the frying pan and into the fire here. You need counselling, and I mean that very kindly. You need support to understand how and why you’ve got this far with a misogynist, and why you were willing to bury an important part of yourself to sustain a relationship with a vile pig.
Obviously everyone on this thread will help you as much as possible, but I think you need real life and qualified support to untangle all of this.
In the meantime, please dump this creep.