Fist let me say I know what you are feeling, I went through something very similar this past year
Try and confide and get close to some of your other friends. It will be hard and it will not be the same as with your other friends but in the end things will get better by doing so. I did the opposite and kept to myself, not pushing my other friends away, but not having them help me, and I was miserable. Only recently did I start getting closer and talking to a few friends and it has made me feel so much better. Also I am here if you want to talk.