I am absolutely miserable at college

[OHMomof2]

there’s almost nothing so immediately effective at giving your mood a boost. Exercise makes your body release feel-good endorphins and lowers anxiety-producing toxic cortisol. Maybe it doesn’t directly give you new friends, but it can make the lonely feelings less painful, give you a happy, cleaned out feeling, more complete within yourself.

So true. Even a nice long not-that-strenuous walk, with or without music, does that for me. I have to remind myself to do it sometimes, when I feel depressed for some reason. It helps my mood within 24 hours, if not sooner.