I dreamed that I killed someone and was chased by a python. Does this have anything to do with reality?

You mean students? Are you under too much pressure? As for the explanation of feeling depressed, it's because you are sleeping in the wrong position. You can't sleep in the sky You should lie on your side, and the best angle is 45 degrees. Occasionally have nightmares, which is a sign of neurasthenia. You often play computer or do other things. The shoulder on your back should be blocked by meridians. You can go to the sanatorium and do a course of back care. Then listen to some soothing music during the day. Don't deliberately think about your nightmares and distract yourself. Don't play violent games or watch horror movies. You should be too insecure. My heart is so empty. Make more friends and have a heart-to-heart talk. If you don't want to in reality, you can find someone to chat on QQ or something. So you won't worry about being cheated. You said you were cheated, which means you are still a very simple person, which means you should keep an eye on things. There can be no harm to others, and there can be no release to others.