I'm going to yell at my landlord's friend
Why would you yell at your landlord's friend? Did they upset you?
He was being rude to me about the rent.
It's not fair for him to be rude to you about the rent but you shouldn't yell at him. Tell your landlord that his behavior towards you upset you.
WTF? When did I say I was going yell? I meant that I'm going to hold a polite conversation with him.
I must have misunderstood your intentions. It's good that you want to discuss the issue with him and work out any differences that you have .