Dream about being back in highschool symbolises the different fragments and facets that make up your character. You need to simplify your life. You have some unfinished business to tend to. It is a signal for the setbacks that you are experiencing in your life. You have lost track of your goals.
Being back in highschool dream is a hint for a barrier, secret or feeling that you are putting up. You are thinking about marriage or some serious long-term commitment/project/situation. Light needs to be shed on some dark situation. It stands for security and stability. You are being overwhelmed with information.
If you dreamt about being back in highschool:
Other people are pushing you to the next level. You might as well give into this wave of energy instead of trying to fight it. Now is the time for you to plan your attack. You are feeling much feistier than usual. Take advantage of your inner fire.