Holding a grudge can be like battery acid to a relationship. The longer you keep it, the more it grows and soon the resentment because bigger than the problem that caused the grudge in the first place. I had a relative that held a grudge against her husband for over forty years because of something that she thought happened between her husband and another lady. The truth to the matter is what she thought happened, never did. Forty years were wasted as she held tight to something she made up in her head and never asked her husband about.