Why is it so hard to give away my old toys?

Like I almost feel like they're old friends or something. Maybe it's because me and my friends used to kind of roleplay and always chose the same toy out of every set. So maybe I feel like giving away the knight my best friend always used to play with is like giving away our friendship? I don't know why I have so much trouble with this, I mean should I give them all away, or should I keep one of my friends who died in 2nd grade's favorites? I'm just lost, and confused on what to do with these. It's not like old office supplies or something worthless that I'm hording, I think I should give them away, but I kind of want a memento to the great times I had as a kid with my friends. Any suggestions on how to deal with this whole scenario?