Proverbs 17:9 Love prospers when a fault is forgiven, but dwelling on it separates close friends.
When I read this I thought of The Lords Prayer, the part where is says, "forgive our trespasses as we forgive those who trespasser against us." Then I thought how God is love, all love comes from God... when we fail to forgive we separate ourselves from God, so we also separate ourselves from love. Notice The Lord's prayer does not say forgive us and just leave it at that ...it says forgive us as we forgive others... so we block our unforgiveness from God we we do not forgive others. Forgiveness is the key to loving others and receiving love from God and from others.
You may ask yourself, I have, "How can I forgive this?" But we can if we ask God to send down His wonderful grace and make us able. I saw a movie once, a true story about an Amish family who's daughter was killed. The mother had trouble forgiving, as we all would, at some point in the movie she asked another person, a child, how do you forgive? The child in all her wisdom said something that went like this, I do it again and again and again each day until one day I won't have to forgive him anymore. The child was willing to forgive and was having a hard time...but what she knew is that if she was willing, even though her flesh was not yet able God would take over and send down His grace and one day the man would be so forgiven by her that she would not have to think of him again.
We are all going to mess up, we are human. We all want to be forgiven. What makes love abound in the world is forgiving others so that God's love for us can flow down from heaven from buckets!!