There are many reasons that you can feel sad, angry, scared or confused
Sometimes you can feel like this if there are changes in your life, but they do not always have to be changes, here are a few examples:
If there are changes in your life
If you are being bullied
If your parents are splitting up
If someone has hurt you
If someone close to you gets hurt
If you are stressed about something
If you have a phobia, which means that you are scared of something
If you feel depressed
If someone close to you dies
If you have low self-esteem
If you are bored
If you feel that something is missing from your life.