How do you deal with a friend who won't forgive?
If it is you that your friend cannot forgive, then give your
friend space. Let a lot of time pass (weeks, or even months). If
your friend still cannot forgive you then you need to face that and
give up the friendship. Just deal with it; life will go on and
maybe years from now you can re-connect. If you have a friend who
cannot forgive someone else, just continue being friends and let
your friend talk about it if necessary. You cannot make a person
forgive someone. It happens over time, or it doesn't happen. You
have to roll with it.