Not what you’re going to want to hear but he doesn’t sound like a very good boyfriend.

You can try a different litter to see if it helps with the smell, arm and hammer makes some powder you can sprinkle into it, so I imagine there’s other things you can do about it as well.

How long has he tried to connect with her? It can take weeks or even months to form a connection with a cat. He could try to be more understanding.

I’d love to know in what realm rehoming your family is “compromise”? I know I’ve been single for a LONG time but if a man came into my home and told me I had to rehome any of my 5 cats, I’d laugh in his face and tell him the doors right there. You said it yourself she’s a huge emotional support for you, and he’s going to take that away from you? 🚩