The relationship we share with the people around us affects not only our mental state but also builds our emotional state.
The way we behave and the words we speak help people determine our mental opinion about them.
Everything that you say is interpreted subconsciously to form an opinion about you.
This opinion leads to a relationship. So whether he your friend or an enemy, your relationship with him is due to your opinion about him.
Therefore, good opinions build healthier relationships that last for ages, but negative opinions form unhealthy relationships that may or may not last for a significant period.