There are all sorts of friends:

Best Friends 
Old Friends
Good Friends
Great Friends
Family Friends
One Dimensional Friends
Fair Weather Friends
Friends With Benefits
Phony Friends
Friendly Enemies
BFFs
Vacation Friends
Business Friends
Supportive Friends
Drinking Friends
Social Friends
Quaker Friends
Jealous Friends
Friends you pay (EB)
Passing Friends
Former Friends
Gambling Friends
Neighborhood Friends
Facebook Friends

What kind of Friend are you?