Is AUTHOR wrong in the post ? POST : It's a little strange to talk about that, but let's go...

I met a lot of people in my life, some good, some bad. But every time someone made something bad with me, I cut the friendship and even if after some time (maybe a year) the person come back asking for forgiveness I am allways like "Ok" (I don't keep hatred, I'm not this kind of person) but I never go back to a friendship

The problem is, in the last two years I met alot of people who, for example, keep saying bad stuff about their past friends (like, this is their only topic) and out of literally nowhere, they go back and make peaces with their "ultimate enemy" like nothing happened

Am I the asshole for not wanting to be friends with people that made something bad with me in the past? It's "normal" to forgive and go back like nothing happened?  