After the murder of his dad, Ron decided to isolate himself from everyone,probably because he needed time to think. He didn't even get to express his emotions with anyone because since his dad was viewed like a bad person ,since he hit on his own wife , that nobody seemed to care that he was actually sad for his dad's death.

But you seemed to care

Hell,maybe you were the only one that cared

you used to go to his house almost everyday...checking up on him,even if he didn't want you to; eventually it led to a fight where Ron snapped when you were asking how was he feeling.

"Why do you even care, huh?"

he snaps