Can you think of the last time you got in a fight with someone? How did that pan out for you? Hopefully you were able to resolve the issue and find forgiveness. I know many of times in the past I would stay silent and avoid confrontation. Some times I would blow up and say something I should not have. Emotions are real and if we aren't careful to direct them instead of be ruled by them, the way we end up dealing with a disagreement can result in something far from glorifying God.
When I think of the Proverbs 31 woman I think of a woman who knew when to stay silent but one that was proactive and not afraid to speak up in grace in truth for the sake of resolution. Proverbs 31:26-27 describes her as one who "speaks with wisdom, and faithful instruction is on her tongue. She watches over the affairs of her household and does not eat the bread of idleness." A person who fears the Lord as the Proverbs 31 woman does, knows that the Lord calls us to live in harmony and unity. With guidance from the Lord, we should not stay idle but seek to resolve any disunity that we have been part of.
Not confronting a disagreement appropriately can create a wound. That wound can bring about an infection in the way you think of, treat, or speak about another person. Instead of blowing up or staying quiet, you can have a healthy conversation, placing this person before yourself; to seek forgiveness and unity. Whether that person seeks to reciprocate your intentions, we should ultimately go to the Lord and ask for strength to forgive when it is difficult to do so, reminding ourselves that the forgiveness extended to us at the cross was not something we earned or deserved.
Jesus confronted in different ways; gently, bluntly, firmly, but most of all He did this in love to point others to truth. As you face any issue with another person, don't let the pain that they caused you or the possible "what-ifs" come between you pleasing the Lord. Stand firm in the hope of the Gospel, seek Him for guidance and in truth and love communicate with the other person sooner rather than later. Communicate before you choose to gossip or allow the wound of unforgiveness to infect you and hold you back from reflecting Christ.