How to approach my husband about ending our marriage if he’s on his last treatment for cancer?

We’ve been married for 8 years. We’re done and I’m done with him. We don’t have kids. Doctors say he’s doing great. He is a great guy.

I have an illness as well and working hard to find a cure. I’m tired of being there for him (he kinda deserves it but I deserve to take care of myself as well.) I don’t like him anymore but I do love him as a family. I told him already before this and he gets mad. We both killed this relationship. I’m so tired but I feel guilty. If I find a cure and live longer, I want to reserve myself for a good man who will actually protect me and make happy. I can see he’s in love with me but I’m not anymore he killed it way before getting sick and I did wrong as well.

How to approach my husband about ending our marriage if he’s on his last treatment for cancer?
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