I know exactly what you mean. Especially the part about dating and meeting new people. If the depression has lasted a long time, you eventually forget what it's like to be around other people because you've isolated for so long; and yet when you do try to interact it comes off as awkward. And that only makes you hate yourself more. Even though I want to meet someone, I don't see a point. They'll figure out pretty easily that there's nothing to hold their interest.