A friend for me is someone who would take a bullet for me, someone which I'll give my last battle-ration to, someone who won't abandon me injured in an hostile territory. It is also someone to tell him everything, to lay on him when you're exhausted, to push him when he runs.

A friend is also someone you see in weekends, or even just speak with him on the phone. Someone who remembers your birthday, who knows what is your favorite color and the football team you support. Someone who went with you through elementary school and high school, someone you can drink with.

In both cases: Someone you feel comfortable with.