I made my first friends when I was 0. I was the adored baby of the neighborhood and all the older kids wanted to come and use me as a realistic doll. I guess one could call them friends. I was always following them around. But the next youngest was 3 years older than myself.
I have never had any friends that I have been really close to though. If I had a friend, it was always that we did stuff together. There wasn't an open sharing of emotion, I suppose.