A clean break is always best. Find closure in other ways. Consider this: she couldn't cope with your illness. She has no certain way to know you won't relapse. You care for her; she couldn't care for you. If she could, she would have been there for you throughout. Don't take it personally. Mental or physical, illness is illness. If you're going to be with a woman, try to find one that isn't as fragile. This one can't cope. And there is no blame to be assigned. It just didn't work. Here's hoping for your continued health and future happiness.:-)
I am really sorry to hear that. Maybe she has given up on your relationship, and thinks the best way to move on is to cut you off completely. I know its harsh, because you didn't receive the closure that you wanted. I believe the best thing to do is to move on too (which will be hard), and perhaps she'll contact you when she's ready.