It probably isn't the best way to go about this, looking for a diagnosis.

You say someone says you were abused (it's in your profile) as though you have no recollection of this.
I think that's great that you have good friends now! Why not find a psychologist who works with dissociative disorders and get a professional's thoughts on this, and how to feel better about living?
In the meantime, don't be afraid to have things that the little you enjoy doing. Even if it isn't another "separate" part of you, it does lend to a thought that you just didn't have enough fun as a child, eh?