These days between Rosh A Shana and Yom Kippur lend themselves well to contemplation on human nature, quiet introspection and reviewing one’s relations to another.
I think sometimes it's easy to confuse forgiveness with absolution, while the later is never possible between human beings.
To me forgiving means being able to grieve over the part of the relationship that has died (for example you had an illusion that a friend will always be there for you during tough times, and she was not – so this illusion of unconditional loyalty has to be mourned and buried, for you to be able to forgive). Things will never be the same afterwards – you may forgive, but cut off the relationship or become casual acquaintances instead of being friends, but things have changed...
Is it ever possible to forget, even when forgiving?