My Dad's health causes all sorts of problems and places huge constraints on what we can do but he is not a burden, he can not help his illnesses - be they physical or mental - and I love him with or without them. Sometimes he will say "oh I am a nuisance" and we always tell him he is not - because it's true, his illness is a nuisance and a burden and he has to bear that burden more than anyone. Sorry, just needed to get that said thanks for listening.