Hmmmm, I don't *think* I'm hanging onto anyone.
By that I mean, when I'm done with someone or something, I'm DONE. So to answer this one in more than just a couple sentences is gonna take some thought.
I suppose I have those in my closet that would fall into this category, doesn't everyone? Right now, in my life today (OK, tonight, LOL), I can truthfully say there is not one person I'm holding onto.
Yes, I have my memories of people who have crossed into my life for one reason or another, but I'm not obsessed with anyone in particular.
And as far as the wish I didn't know someone goes, yeah, I have a few of those. Mostly people who popped up at a time when I could have really done without their drama or agenda.
They are gone now, out of my life and I feel I'm doing just fine without them...