This is college, your parents aren’t here to lead you toward the “right” choices, tell you not to eat a bunch of fast food, or take you to the gym. This is your life now, and if you don’t start parenting yourself, nobody will.
Sure, it’s a big step, but it’s something everybody has to go through. Do what you think you need in the moment, feel free to indulge and try whatever you want but, like a parent, keep a long range view. Make sure the stuff you’re doing now gets you somewhere and won’t destroy you in five to ten years.