I think the first step to restore your social connection with people is to accept that they're humans; that they have faults, they won't always be faithful, and sometimes they will hurt you.
The sooner you accept the bad about people, the quicker you will understand and appreciate the good parts of having them in your life. Realizing that you can be the same way as well wouldn't hurt either. Being self-aware, and analyzing what mistakes you have/will make will help you identify with others.