It's rude to give someone the silent treatment.
Jill is angry with her girlfriend because she forgot about their dinner plans and stayed late at work.
Jill wants to express her disappointment towards her girlfriend.
Jill lets her girlfriend know the second she gets home why she is mad.
Jill avoids speaking to her girlfriend for several days.
Jill's girlfriend understands what she did wrong and makes it up to Jill.
Jill's girlfriend never learns why she was mad and doesn't know how to change her behavior for next time.