why?

Why does everyone think I need anti-depressant?  Are there not some people that go through a tragic illness with a positive attitude? Can we not always turn to drugs and maybe turn to God?  Can we not go deep into to our brains and try to find a way to save the one we love?  Well, that just hit a cord ,now tears are coming and I can stop them.  Maybe seeing these things on paper that I have been telling myself is helping me come to reason.

For those that don't my husband has alzheimer's .  He was diagnosed two and half years ago.  That was wen my whole world changed.  I went from a woman that was cared for and pampered, to one that needed not only to take care of myself ,but to take care of a sick person.  I hated people that were sick(take care of yourself) and you will not have to worry about that.  That is what I thought.  Was I wrong!  He  was only 55 years old in good health, had his own business which he loved, 3 children and good marriage, everything a man would want.   Why did this happen?