you shiuld thank someone when they invite you to something.
Armond has been invited to his friends birthday party at his friend's house.
Armond wants to go to the party.
Armond hugs his friend when he gets there and thanks him for inviting him.
Armond goes to the party and doesn't even talk to his friend.
Armond's friend invites him over every time that he has a party.
Armond's friend doesn't invite him to any of his future events.