I'm going to put my two cents in. Keep in mind I am not the greatest with this kind of thing, but I have experience. Choose to follow my advice or not. I won't mind if you think I'm a fool.
I dated the most wonderful girl, but she was anti-zoo. She knows I'm a zoo, but she still cares a hell of a lot about me, even after we broke up (and before anyone asks, it was for unrelated reasons). I didn't deny that I am a zoo, and she and I are still close. She doesn't know about my experiences, and she never will, but I would rather leave her in the dark than not have her in my life at all. Besides, we're not together anymore, and she's not interested in hearing about my sex life.
That being said, despite my identity as a zoophile, I would have given it all up for her. As much as I love animals, another human can do so much more for me outside of sex and companionship. I don't want to go into examples right now, because that's beside the point. I don't think she'll come back, but I would choose to have her back over the hottest animal sex imaginable.
Ask yourself these questions:
1. Do you love each other?
2. Is he more important than zoo sex?
3. Is this a sacrifice you're willing to make?
Chances are, if you answered yes to all of these, you should keep him around. And even then, you could still try some things when he's not around—provided you have a plan for when he drops in unannounced.
Don't lie to yourself. You're a zoo. But if you love him enough, it's worth either sacrifice or secrets—but that part is up to you.