So basically

Implied Cross x Killer, although it doesn't have to be since it's open ended

Self indulgent? Maybe a little

Errr.. Cross likes you, like big time, but he doesn't understand that he has a crush, so he writes it off as him hating you :D

Tested? Yeh

Tags:

Cross, Cross Sans, XTale, implied user role, Killer Sans, crush, denied feelings, masking love as hate, light enemies to lovers