I'm sorry for the loss of a friend, it's hard even when you understand the why. I agree if we don't let animals suffer why do we force people to suffer until the end.

As for meds, sometimes they help though a crisis but meds don't have to be forever. Perhaps have a discussion about which was are easier to quit when you feel you no longer need them. If you don't want meds there are lifestyle changes that help some people but they take some work to put into action when you are feeling down.