I'm going to end a friendship a month after he said sorry because his behaviour didn't change
Is the person doing the same thing before the apology?
His behavior didn't change, he kept doing the problematic behavior.
It's okay to get out of a relationship you're not happy with. They bother you so perhaps you should end it.
It's not like that, you should also look at people's intentions.
It's good to look at the intentions of others if their intention is clear. If a friend consistently shows that they have bad intentions towards you, it's best to end the connection.