I'm so, so, SO sorry... you're probably in a lot of pain over this. My thoughts are with you...

But one thing that stands out in your posts about this so far is that even though I love my pets more than my life, it does sound as though you're pushing your "causes" onto him and that could make anyone resentful. He probably feels as though there is no way that he could ever prove to be as charitable as you are, and it makes him feel inadequate, and perhaps he doesn't cope well with his own feelings of inadequacy. I don't know either of you -- it's just a hunch.