That is not exactly correct. Many of us thrive on being alone. The problem is the lack of identity. We don't really know who we are and have a tendancy of latching on to others and taking over parts of their identities (acting like them, taking on their likes/dislikes, etc). When they leave, it's as though a part of us walked out the door too and that can be very hard to deal with. I, for one, am good with being alone. I feel like I kinda know who I am when I'm alone, but when other people are in the picture for any length of time, it makes their going away hard for a while. When that passes, I'm fine with being alone again. I hope that makes sense.