Study abroad for a semester or for a year. (You can do two separate semester long study abroads if you prefer. For example: South America, Australia, New Zealand, Europe or Asia.)
Consider a semester at sea.
Clearly, you need a change of pace from traditional school settings.
If you like winter sports, take a semester off to work in Colorado or in Vermont. If you like scuba diving, then do a term in the Bahamas.
Life is too short & unpredictable to waste time being unhappy. Do something fun, something that you enjoy & you fill find your path.
Also, consider working on a political campaign for a year or for a semester.
Exercise, eat a healthy diet & avoid alcohol & drugs.