hearing him saying that makes me feel like some sex doll.

That's essentially what you've become to him. You let him cum over and over and over and you never get any pleasure yourself. How is that fair? How is that satisfying? How does that show any love, at all, except your love for him? His mindset is toxic, selfish, and immature. All my personal experience points to: he will not improve, he will never care, and his behavior towards you will only get worse over time. He can't even say what he did when he says sorry, which means it's not a real apology. He can't accept responsibility for his own behavior and that means he will never fix it.

DUMP. HIM.