You and your family and friends are blessed and healed by Divya Pragya Param Siddha Shri Shri MahaAvatar Babaji!
It may not be easy to forget ill treatment, leave alone forgiving a person who did it. However, by not forgetting and forgiving, we only suffer. The other person may not be even aware of what we are going through. Therefore, wisemen say, forget and forgive.
Once we forgive a person Dil se..(wholeheartedly), we become light and joyous. We need not then relate with that person in future. Our hatred should be replaced with prayers for them.
This process may or may not change the opposite person, but it will certainly change us for the better.
May God bless us with the wisdom Forget, Forgive and Forwardly March in our lives!
Tathastu! Swasti Siddham! Amen! So Be It!