Dream about crying really hard means sadness, hunger, poverty and struggles. You need to acknowledge and confront the issue in order to complete your transformation and achieve wholeness. You need to proceed with caution. The dream is a harbinger for some sort of failing relationship. You need to break away from your old outdated attitudes and habits.
Crying really hard dream states your primal instincts and reactions toward life, food, etc. You do not let people in your life easily. You should not always rely on what you see or hear. This signifies failure to realize your hopes and desires. You are using your anger to get your own way.
If you dreamt about crying really hard:
Although nothing is being said, they may be picking up that all is not well, and feeling quite irritated without really knowing why. If you have an axe to grind, then perhaps it would be better to do this openly, rather than stew quietly.