When we forgive, we take a weight off not only our shoulders, but off our spirit.
Yes, to forgive someone is hard, because we remember the transgressions against us. The hurt and pain is fresh and open like an un-healed wound that reminds us constantly.
But then you have to think, as I walk through life daily, and do things that may not be in my character against others, as well as not pleasing to God, He yet forgives me.
Forgiving allows you the opportunity to move forward, and embrace the blessings that were once blocked by the pain and hurt against you by certain situations or others.