In Matthew 5, Jesus told his followers, "If you are offering your gift at the altar and there remember that your brother has something against you, leave your gift there before the altar and go. First be reconciled with your brother, and then come and offer your gift" (vs. 23-24).
In Matthew 18 he added, "If your brother sins against you, go and tell him his fault, between you and him alone. If he listens to you, you have gained your brother" (v. 15).
In the first case, you have sinned against someone. In the second, someone has sinned against you. In both, you are to initiate reconciliation. You are to speak to the person, not about him.
What if he refuses to listen? Jesus tells us: "If he will not listen, take one or two others along with you, that every charge may be established by the evidence of two or three witnesses. If he refuses to listen to them, tell it to the church. And if he refuses to listen even to the church, let him be to you as a Gentile and a tax collector" (Matt. 18:16-17).
Relationships within the body of Christ are essential. But it begins by going directly to the person, initiating reconciliation.
Who do you need to go to today and make things right?