To dream that you are suffocating, signifies that you are feeling smothered or oppressed by some situation/relationship. Something or someone is holding your back. You are experiencing stress and tension. To suffocate someone in your dream, indicates that you want to dominate or overpower this person in your waking life. This person may also represent an aspect of your own self that you are trying to control.
Read more about dreaming of Suffocating in other dream meanings interpretations.