I try to not hold onto grudges and I do believe in forgiveness.
I also believe that when someone shows you who they really are, believe them. There’s no need to hold it against them but know what/who you’re dealing with. Once something is revealed to you, you can’t “un-see” or “un-hear” it, nor should you put on rose-colored glasses and deny the facts. But you must realize that your life goes on, with or without them. Be mature and reward yourself with peace by forgiving others even if/when they don’t ask for forgiveness, especially when you realize that some people just can’t help it. Pray for them to gain wisdom of their actions and how it affect others.
But forgive them anyway and reward yourself with peace. Then, continue to live your best life.
Peace, Love & Blessings