i guess at your age you are still trying to find yourself, i still am currently, but i think use your time right now and focus on self care, i feel like everything will fall into place after that. focus on exercising and eating healthily and you will feel a lot better. your mind will just clear its thoughts, also try meditating.

have some quotes to just keep you going, one of my favourites is short term pain for long term gain. also if you just pretend like you are living a satisfied life, if you fake it, you will eventually make it.