I went through something similar. At work, I felt isolated from all of my co-workers. I became very unhappy because I was once part ot the team. I complained bitterly to my friends. Then, my friends stopped inviting me places. I felt like they were shutting me out. I was severely unhappy and spent many days crying about the situation. I decided to change my focus. That meant doing the things that none of my friends were interested in doing, but that make me happy. I joined social groups, not to make friends, but to pursue and develop my interests. I enjoyed myself, and that translated to the people in the group - I made new friends. This brightened my outlook. As a result, I was a happier, calmer person. Interactions with my co-workers became more positive, eventually returning to their former state. I posted blurbs on a social networking account about the changes I had made, and how good I felt. My old friends replied that they were happy for me, and the lines of communication with them were once again open. I came to realize my feelings of isolation gave me a air of negativity that made me unapproachable; and my constant complaining made me a dull person to be around. It was a good lesson for me to learn.

This little book may help you.
'Who's Rejecting Who?" by Xavier Waterkeyn.
You are on an exciting journey to understand yourself and others. Hang in there.
Suze