Instead of loving your enemies - treat your friends a little better.
When a friend is in trouble, don't annoy him by asking if there is anything you can do. Think up something appropriate and do it.
Don't abuse your friends and expect them to consider it criticism.
Probably no man ever had a friend that he did not dislike a little.
It may be a cold, clammy thing to say, but those that treat friendship the same as any other selfishness seem to get the most out of it.