Peter Pan Syndrome?

I have a few close friends who are my own age, and have acquaintances who are older than me.  But the vast majority of my friends could actually be my adult children.  We like the same music, we like the same books/authors and even the same recreational activities, etc.  I am comfortable in their presence and oddly enough, they seem comfortable in mine despite my age and decreptitude.

This observation occurred to me today when a group of friends got together and I spent most of my time at the end of the table with the younger set rather than those my age and older.  I wondered, is there something wrong with me?  I'd say, my younger friends are remarkably mature (which is true) but I don't think that accounts for it, strictly.  Am I refusing to grow up? Am I stuck in a permanent second childhood? 

My spouse has always looked very young.  Age hasn't been kind to me, however.  I don't think it bothers me, much, to look my age, as I'm rather resigned to it by this point.  So what is it, then? 

I realize I'm prone to navel gazing to the extremes, but on this one, I think I'll have to ponder the significance (if any) for awhile...