I dated a girl who informed me my snakes would have to go when we moved in together. I laughed and told her they were here before her, they'd be here after her.
Then I met my wife- way hotter, way smarter, way better for me, and loves animals. She's not as keen on the fish as the other animals, but she doesn't care what I have. She even puts up with boxes of aquarium junk taking up precious space in our tiny little house.
Don't give up something you love. It's not worth it, and you'll end up resenting her.