Out and incomplete

Has anyone felt incomplete since they ETSed? I feel so low so often. I don't go out much but mostly because I don't relate to civilians. How do you cope? How do you integrate back into the civilian world after feeling like some sort of an alien and does that feeling go away with time? I feel so alone and have since getting out in '16. It's miserable but I keep pushing on (and intend to keep pushing of course).