Proverbs 18:19
An offended friend is harder to win back than a fortified city. Arguments separate friends like a gate locked with bars.

Matthew 5:44-47
“But I say to you, love your enemies and pray for those who persecute you,  so that you may be sons of your Father who is in heaven; for He causes His sun to rise on the evil and the good, and sends rain on the righteous and the unrighteous.  “For if you love those who love you, what reward do you have? Do not even the tax collectors do the same?  “If you greet only your brothers, what more are you doing than others? Do not even the Gentiles do the same?

Matthew 6:12, 14
and forgive us our sins, as we have forgiven those who sin against us.  “If you forgive those who sin against you, your heavenly Father will forgive you.

Matthew 18:15-35
“If your brother sins, go and show him his fault in private; if he listens to you, you have won your brother.“But if he does not listen to you, take one or two more with you, so that BY THE MOUTH OF TWO OR THREE WITNESSES EVERY FACT MAY BE CONFIRMED. “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. “Truly I say to you, whatever you bind on earth shall have been bound in heaven; and whatever you loose on earth shall have been loosed in heaven.“Again I say to you, that if two of you agree on earth about anything that they may ask, it shall be done for them by My Father who is in heaven. “For where two or three have gathered together in My name, I am there in their midst.”