Hope you're ok OP. I know what I'm about to say is bollocks, but I think it will make sense with regards to him.
We're kind of ingrained to think of rape as a psycho in a dark alley leaping on to an unsuspecting victim in the early hours of the morning. It's how it's portrayed on TV. It's almost "included" as part of an attack.
I think that's why it feels like it's not, "because he loves you".
First. He's wrong. Obviously. But could it be possible that he'd actually be fucking mortified if he thought he'd raped you, but he genuinely doesn't see it as rape because he's not a devious alley lurking predator.
I hope that makes sense, I'm not making excuses for him, but I would question someone who genuinely truly loves you, acting like that, if he knew the severity and the effects. He perhaps thinks something as basic and ridiculous as "I know I'm pushing my luck, but I'll give it a go and see what happens".
Have you spoken to him. Sat him him down, looked him dead in the eye, and said, "You need to understand you raped me. Do you understand that it does not matter how much you love someone, sex without consent is rape. You raped me. I need you to accept that. Perhaps you don't think you did, and you think of a rapist as something quite different, but you raped me."
Realising that he has in fact, raped his own wife, is probably going to rock his world, he's probably going to feel like the lowest of the low. I think you can work through this OP, if you want too.
If you need to talk, MN is here for you. There are a lot of excellent women's help centres who can advise you of your options and how to proceed.
Sending you hugs and support xxxx