The word I said to you after we broke up

When we broke up I guess the one who was hurt most was you. I'm sorry for what I did and what i said to make you so hurt but we had to go on our own ways sooner or later. I;m also sad but I will remember the word that i said to you to make you so hurt we were having a wonderful picnic next to a waterfall.  We argued and then we broke up. I remember that word I said to you. BYE , I said after you turned away and started to walk away from me. I knew we were never going to have this relationship again so I said bye to you before we go on our separate ways.