Teddybear,
I don't have personal experience on that issue, but if my opinion is of interest to you then here it is: If somebody cannot handle the disease, that means he/she doesn't really love you. Simple as that. My husband is a very optimistic guy, he always sees (as we say here in Greece) the glass half full, and not half empty. And this makes things easier for me, because it gives me strength to carry on. And as we have discussed many times together, when a couple has a relationship or are married, no one really knows what will happen to whom.
Everybody deserves to have somebody by his/her side, who really cares, and everybody should feel loved by somebody else. This is a human right and I don't compromise with medium situations.
Bottom line is, girls who dump you, should really understand, that whatever happens to you, can happen to them too. What you give, you get.
Take care