To watch a hanging in your dream represents feelings of insecurity. The hanging may symbolise aspects of yourself that you want to eliminate.
To dream that you are hanging yourself suggests that you are trying to escape from some guilt or fear. Consider also the image as a pun for something in your life which you have left hanging or unfinished.
To dream that you are hanging up clothes suggests that you are clarifying your thoughts and elevating yourself to a new state of awareness.
To dream that you are hanging out with friends or other people is a way for your dreaming mind to decompress and wind down. Perhaps you do not have time to socialize during the day. Alternatively, the dream may be telling you that there is something you can learn from your friends or others. You need to incorporate this quality into yourself.