This really bugs me. I don't like that we have so many pets and I wish we could get rid of some
You need to negotiate this with your partner.
Yes, but I feel like we keep acquiring more and more.
It's not right that you're getting stuck with more pets than you're comfortable with.
You don't think I'm a bad person for not embracing all these animals?
Not at all. You and your partner need to talk. She shouldn't burden you with more pets than you feel you can take care of -- it's unfair to you and it's unfair to the animals.