My Best Friend?

 My beautiful, talented, compassionate wife asked me last night randomly as we were standing in the kitchen: "who's your best friend?" Without hesitation i said "you are!" I got that look. you know the one that says "no i mean the real answer!" Which was shocking to me, because that was the real answer, but she pushed me for more information. I told her, "I don't really have 'another' best friend." I have people that i call friends, some closer than others, but none that i would comfortably call up and bare my soul to. That's not to say that there are not people that i like hanging around and doing stuff with, but i have never been the guy that calls someone up and says: "Hey, let's go do this, or that!" It is just not comfortable for me to do that.

On the other hand, if someone calls me, and I have the time and the inclination, I will usually say "sure!"
Again, I am not sure why I am like that...deep seeded (or is it Seated) issues? Low maintenance in that i don't need a lot of outside stimulation for survival? or something else? Not sure.
Am I the only one that feels this way?
I can look back on a time when i think something of significance changed me for all time. I was 12, I went to my sister's wedding in New Jersey and then up to my grandmother's house in the Catskills for most of the summer. When i came back, my dog, Sam, was gone. I was told by my father that they (actually my mother) gave the dog to a farmer (desert arizona..farm? hmmm?). Sam and I had always been inseperable. We explored the desert side by side. She went everywhere I went, except of course school. I think something broke in me when i got home and Sam was gone, and even worse that she was given away, because a parent did not want to be responsible in my absence. Whenever I am asked a question like my wife asked me today...I draw a blank because I immediately think "human" In the animal world the answer is instant: Sam.