u/Jadugar-67

There's a friend of mine whose behaviour are like he's narcissist. Self centric and super impulsive if someone not agrees with him. He is in his late teens. He's desperate to hear what he wants to be and want others to act like him. Unfortunately he got some friends younger than him who are like flatterers and they also agree with him. And they think he's never wrong and is always right. He even has made his relationship bad with others because of his such behaviour.

Just wanted some tips to help him out.