Forgive and Forget.

I saw a cousin's FB status about forgiving and forgetting. He said something about forgiving and forgetting and about how if one forgives one must also forget.

I don't really know how it works. As far as relationships goes, I've forgiven the people who hurt me but I haven't forgotten the things they did to me.

Forgetting seems to be an absurd idea. Except when you have Alzheimer's or dementia. But sometimes I want to forget just so it's easier to move on.

Help?