I think the whole thing is just so tiring. I think almost everyone I know would do something if I were in trouble and if I asked them (to a point, I don't know anyone who would want to take care of me for a month - even myself).
I read recently that marriage is becoming the same thing where we want our partner to be EVERYTHING - the drinking buddy, the confidante, the psychological help, the travel partner... and supposedly that makes everyone unsatisfied with their partner because it's such a stupidly tall order. Do we hire people to do all those things for us too? On the other side though, if you find that person, you get REALLY good marriages. I would suspect the same is true with friendships. Instead of being worried whether a friend is a true friend, just relish that you have friends who can serve different purposes in your life and if you have a close one - enjoy it.