If in your dream you see yourself crying this represents suppressed emotions from your waking life which are seeking a way of being released.
In your dream, your subconscious feels that it is finally safe to express what your conscious side has been trying to conceal. This is normally a sign of stressful or traumatic events in your waking life which you feel unable to deal with at the moment.
If you see someone else crying in your dream this represents a reflection of your own emotional state on to them. This can be a sign that you do not yet feel comfortable expressing your feelings or acknowledging your pain and so you project these emotions on to someone else so it is easier and safer to deal with them at a distance.
If you are crying when you wake up this represents a traumatic experience in your waking life which is demanding to be dealt with now. You have been suppressing your emotions and hiding from the realities but things are coming to a head, and your subconscious feelings are making their way to the surface so it is time now to confront them head on so that you can find a balanced emotional state again.
If you dream that you crying but no one can hear you this shows that you feel isolated from those around you. You are not confident that the people in your life will be supportive or listen to your needs and you are scared to show your true emotions. Consider whether you are are justified in feeling this way.