When old friends come back...

I have a friend that has recently come back into my life. I sit and wonder why they left to begin with. Or did I leave. Were we ever really friends? What is it about me that attracts people to even want to be my friend. I think I use to be better at being a friend. I am a firm believer that everyone comes into your life for a reason. Have you ever met someone and thought, I wonder how long this will last. No, because most people don't think that way. But, what I have done with certain friendships is think about when that person first came into my life. Or better yet the defining moment when I knew through thick or thin we would be in each other's life. So tell me why some people treat perfect stangers better than their friends. Why do we do this? There is an old adtage that goes something like we always hurts those we love. Therin lies another adtage about there being a fine line between love and hate. So the question that begs, is there a reason you are coming back into my life now in this particular moment? What will be different from before and what will keep us from drifting apart again? How can you have missed me? When I felt relief at our parting. Is it age that makes me weary of the idea that we can be friends again? As we stand at the crossroads only time will tell.