I was thinking about the friends thing overnight. I came to the conclusion that there is generally a lot of rubbish talked about whether people are "worth" your friendship, and whether they deserve to be deemed a friend.
In my experience no one is all good or all bad - and its perfectly possible to have friends who are appalling in some aspects. The trick is to know the limitations of the friendship. Hence don't just expect a friend to keep your secrets, any more than you can just expect them to conform you your own moral codes and attitudes.
You can't control your friends, but you can take the rough with the smooth - and try to see the best in people rather than dwell on the negatives.

Kris