No matter where you are or what you lived through, life finds a way to try to make you alone. In response we have to actively swim against this tide. Take efforts to hold on to old friendships and seek out new ones.
I my case it was the geological separation caused by the High School -> College transition. My efforts to hold onto an active friendship with my closest High School friends resulted in all but one of them being "friends but lost touch" and that last one recently improved from "infrequent IM chats" to "see once every 2 weeks". However without such efforts I wouldn't even have that.
So swim against the tide and remember that it can get better.
