Sometimes people just naturally fall out. Having an emotionally driven personality I understand what you mean by going through an, "attachment" and detachment process. Sometimes when one is too attached, the other feels even more driven away. It's important not to focus on blame or hold ourselves victim to what we perceive as cruelty between once friends. Instead we can focus on the presnet as Squirell suggest. As Nikki said, the kind things shared between people, even those on now separate paths will never disappear. Hold on to those most of all. My past is focused on this life time. Looking at a life before this is different for me because I believe I've memories of a future life... What a cooky world we live in!
What are samskaras?