My BF will only have sex under weird situations?

I'm in a very strange relationship that I'm starting to second guess...

My boyfriend (we've been together for almost a year) he says that he has low sex drive, yet masturbates everyday to porn. Sometimes we only have sex one every two weeks, it's like he withholds sex?

When we have a big argument on the verge of breaking up or already threatened to leave, he comes around, finds a way to convince me to sleep over and when we're asleep he approaches me, takes my underwear and attempts to have sex with me whilst I'm asleep? This has happened a few times and feels like it has become a kink of his? I'm slightly concerned as I'm not sure if this behavior is normal or it's like "Porn" induced...

We would only have sex when that happens or when he'd turn up at my house at 2AM drunk and "in the mood" but we would never have normal sex?

Like intimacy with him is just so weird, I know I should leave and mentally I'm preparing myself to do so but I just need to know what is normal here