share your feelings when meeting up with your bestfriend who've been gone

actually i have a best friend for 2 1/2 years but now were not that close anymore, i really miss him when we see each other we sometimes just smile to each other and have a high five, but before we have a very much long time of conversation and bullying each other but as time goes by we both start to change the way we treat each other, were still classmate but in one day as if we don't know each other we don't talk and even smile to each other when we see each other at the hall way, i really don't know whats happen it is just like were shy to each other, i'm still hoping that someday we can bring the friendship we have before, good day and happy mylotting