In any long-term relationship, there are many occasions for disagreement, conflict, and hurt — things that can damage or end relationships. This is true of those following Jesus and those who have not yet started following Jesus. One might think that inside the family of people following Jesus there wouldn’t be conflict, since all of us stand on the common ground of having been forgiven by God, and were told to forgive others as we have been forgiven. But people who follow Jesus have feelings just the same as those who don’t, and those feelings get hurt some times.
There are those in the faith who advocate suppressing your hurt feelings as a strategy for being more like Jesus. Good luck with that! Suppressed hurt feelings tend to bubble over in unexpected and undesirable ways, generally causing havoc for those who get bubbled upon, as well as for the bubblers. I do agree if the offense is small and it caused no real damage to the relationship, it is often wiser to overlook it. This is called “forbearance”. However, for those offenses that we have difficulty shaking, we can’t simply forbear, we have to do something about.
I’m pretty sure Jesus would not recommend stuffing our feelings. His comments in Matthew 18 suggest that He wants us to talk to the person who hurt us, for the purpose of restoring the relationship. I have heard some really bad teachings on Matthew 18, which spent a whole lot more time on punishing the other person. But if you read Matthew 18 as anything but a desire by Jesus to restore relationships, then you are reading it incorrectly.