Working out has been shown to improve emotional wellbeing and promote happiness. It’s not a ridiculous suggestion.
That said, did you read through the other posts? It sounds like you are struggling. Visiting the counseling center is not a terrible idea.
Re-read post #1.
What are your plans for the summer? Can you go study abroad next year? Do you have off campus housing lined up for next year? (From your other thread it sounds like your roommate situation sucked this year).