It is rude to disregard other people's feelings.
Patty is having a bad day and is very upset, but Jennifer has had a great day.
Jennifer wants to talk about her great day.
Jennifer asks about Patty's day, consoles her, and only after Patty asks about Jennifer's day does she talk about it.
Jennifer goes on and on about how great her day is and doesn't ask Patty about her day.
Patty sees Jennifer as a good friend, and they hang out more often.
Patty feels even worse, and decides she doesn't want to see Jennifer anymore.