Why can't we make peace with another girl we fight?

This happened once in 8th grade. I won the fight but was willing to shake hands, move on and create a new friend but she still hates me till this day.

I don't like holding on to anger for too long. Sometimes when guys fight each other, they have a beer and are friends. They turned an enemy into a friend. Why can't we do that with another girl we fight?

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+1 y
I was ready for a truce but she didn't care. It seems that we generally (well not me) tend to hold prolonged grudges after a fight with the other girl.
Why can't we make peace with another girl we fight?
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