I miss her skin when I used to put my cold hands against it after work.
I miss her stories about her day. (Probably lies, but not the point.)
I miss wrapping my arms around her in the middle of the night.
I miss the way her hair smells.
I miss her kisses, I miss making love with her.
I miss having somebody to tell secrets to.
I miss always having somebody to talk to.
I miss having a best friend.