I understand that social mores are different in different countries & not sure what it would do to you to leave. Actually his responsibility goes beyond just "KEEPING" you as his wife, but if love now is only one sided (your side) then I would look into what you really want your future to be. Going on for the rest of your life in a loveless marriage being KEPT by your husband.....or what it would be for you given the society & culture you live in to get out of it. Sometimes neither choice provides good end results.

I am so sorry you are going through this because of something that isn't even your fault but a medical one

Praying that the right solution will make itself known to you in the near future