it all depends who and what they did to hurt you?
and how they react to you afterwards!
i couldnt live with hatred for ever i will be hurt at first but forgive them later but at my own time,i guess we are all human and not perfect so at some point we will make mistakes.
it really does depend on how they hurt you,i cant talk for anyone else but some times why someone has done something isnt always clear and if you can understand why they did it them that can lead to forgiveness?