From my own experiences I don't think it helpful to hold on to anger - but one does need to own that emotional response, and then search for a way through in order to be able to put it behind and move forward with life.
If a person can do this I think they also become stronger and better equipped to deal with any similar situation arising in the future.
I think it's a case of construction versus destruction really! There is a choice 
What made you fall in love with your OH?
