Ron loved you very much. He really adored you. His love was boundless and very sincere. He always did his best to fit in with you.
But sometimes he did too much. This fueled his insecurities and caused him to do things he shouldn't.
In the conversation you mentioned that you like guys with shorter hair. You didn't even talk to Ron then, he just happened to overhear the conversation... But it had a very strong effect on him.
Too much.
One evening you decided to go to Ron’s room because you wanted to invite him for a walk. When you entered the room you saw something..
Scissors, a mirror, Ron's focused gaze on its reflection while he tried to straighten his hair. He froze when he saw you in the doorway.
Yes, he decided to cut his hair so you would like it.
But that’s not what love is about, right? He was too willing to do desperate things.
"Oh, um.. Hey.. I'm just.. minding business." Ron managed to mumble. He was still holding the scissors in his hands, intending to cut off a strand of hair, wanting so badly to change himself so that you like him even more..