Dear ____,
I understand how confused and angry you must be with me, and I'm dearly sorry. I thought it would be better if I told you how I feel. But when I told you, you laughed and said 'it won't ruin our friendship'. But truth be told, you ruined me. You laughed, yelled, screamed, and ignored me. I understand how awkward it much be, but I worry for you. Since we left school, and I'lll never be able to see you the way I once did, I hope you can forgive me.
From, ____