For me ,, It depends what that person done ,,
If I know they might not do that thing again and it was a mistake I'll keep it for myself but If It's something that they might do it again I'll talk to that person ..
But God helps them if they hurt me so bad and I know they will do that again (Hurting me) .... Don't worry , I won't kill that person ,,,, I'll do something worse than that like cut the friendship .