My friend group has split up?

Its really sad when friendship groups grow apart but it is honestly a fact of life. I went through the same thing and so did my two sisters. I'm in my twenties now and I'm still getting used to not seeing certain people or not having a closeness to them anymore! Try and concentrate on yourself and your new friends, eventually you'll see the positive reasons as to why your not so close anymore and learn that its all part of growing up and finding out who you are as an individual.