Being a friend sometimes requires you to tell someone that what they are doing is wrong; sycophancy and friendship are incompatible. It's called "tough love". If your friend has had too much to drink, and is acting in a belligerent and irrational manner, you call him a taxi, or you try to settle him down. You don't tell him he's okay to drive home.

Since September 11, 2001, Tony Blair has not been a very good friend to the United States. When we needed allies, instead we got co-dependents.