to me a friend is someone you talk to frequently, someone you can tell secrets to and not worry about it being repeated or about being ridiculed or teased for telling, someone who likes/loves you for who you are, not what you know, what you can do, what you will do for them. Yes, you do things for friends, but friends don't expect you to do things for them. it's someone who you can just sit in a room with and be there.