Sorry to hear things are going well.

It is fine to be more serious...I'm one of those types...I can feel isolated because I feel I don't fit in. My depressive symptoms leads me to do things that also isolates me from activities and friends. So my first thought is to work towards accepting yourself as a more serious kind of person. Second is to counteract your depressive symptoms. If your not getting some professional help, now would be a good time to seek that out. Guidance is really essential in beating the symptoms. You have found one of the best sites (psychcentral) to start gathering information.