I am going through the same phase. I have some of the friends moved overseas forever, they hardly even come to the home back. Many moved to another state and city. Now the place where I am look strange to me even though it is the place where I am born. Without people it just doesn't help.

Thing that one of the psychologist told me is that everything has to go and you can't live with past. It was good when everyone was around you and things were good. this will not happen again and that;s the beauty of life.

You have to move to some other place and make new friends even if it is hard, just smiling and saying hi can create some random friends these days. I was told that if things are not meant to change then we get into such rut and we start to miss things. Make every day a new day with some random twist. Do something different everyday, you won't miss the past be it good or bad.

I am trying that by sticking with the internet and some other things that changes my mood. Hope you will find one random thing that changes things for you.