I'm sorry for your pain. How long have you been contemplating ending it all?
As for the matter at hand: there are two issues here, neither should be ignored. Having said that, it is a bit jarring to hear that it is alright if one sex dies as long as the other doesn't have to suffer. Say that to a domestic abuse survivor.
And for the matter you brought up: Being the SO of someone chronically sick is a whole other bucket of issues. Chronic disease hits far wider than the single individual, but the one being sick is not in a position to see that. "What are you whining for, I'm the one being sick" is to easy a retort, thereby stating that support should only go one way in the relationship...