Feeling Guilty for others won't help them
Your decision of not feeling guilty also shows your forgiveness. When you are feeling guilty it means you cannot forgive yourself. Accept your mistake, say sorry and leave the guilt.
You want to live in guilt. If you do not want to, you can come out of it. You can just leave it and decide not to be in guilt. But being in this feeling is easier than making the decision of not being in guilt.
Guilt is the result of the wish for perfection. You want to be perfect and this mistake proves that you failed, so you carry it around, defending your mistake, blaming others, hiding so that nobody finds out that you are not perfect. Everybody makes mistakes and nobody is perfect!
A mistake is something that you learn from. Everybody makes mistakes and it doesn’t make sense to walk through life with this guilt until you leave the earth. Do your best to say sorry, to repair what is broken or to change the way if you made a wrong decision. However don’t carry it around after that otherwise you will be a prisoner of this guilt. Be free.