Far too many of us carry around burdens that we don't have to endure. Mistakes from the past haunt our daily lives and direct our actions. The guilt remains because, although time has passed since the incident, it remains unresolved. In the spiritual life, we have the Sacrament of Confession. The Sacrament is a time to talk it out, and receive forgiveness for our past mistakes. In our interpersonal lives, we need to make amends. Don't let your mistakes be enduring.
We’ve all made plenty of mistakes. Some are due to youthfulness, others to stupidity, and others to selfishness and pride. Regardless of the reason, they all point back to us. We’re the cause of the error and that means that it's up to us to fix it.
The worst possible response to an error is often the one that's driven by shame: to do nothing. While we may have the capacity, ability, and the contrition to make amends and move on, shame keeps us quiet. It's just a little too painful, a little too raw for us to breach the topic again. That’s no way to live. We need to summon the courage within, draw from our strength of character, and confront the person. We need to stand up, admit our fault, and sincerely apologize.
You both deserve more. You both deserve the freedom to move on. You both deserve the peace of resolution. Charity demands it and, frankly, mercy is more satisfying than revenge. We tend to get into the worst fights with those whom we are closest with. That means that the ongoing acrimony is preventing both of you from enjoying your friendship. Be bold, be brave, and make amends.