The word "pain" has a very deep meaning, but "betrayal"? You felt hurt inside so much you didn't even recognize him and you never understood why he had done it.

"Ugh-... It's you" After four years, he's still the same. He turned everyone against you, and for what? Popularity had blinded him. "Let's do that damn job so I never see you again." That had to hurt you more than it already did, and he simply sneered when he noticed you lower your head.