Yeah in college I experienced both extremes. I spent about a year and a half completely isolated, just traveling between classes and my dorm. It was self destructive and my grades and mental health suffered. Then I made some life changes and started going to clubs and events and made friends and suddenly it was easier to study even though I had less time. I became extremely social and found myself spending nights doing everything from deep discussions of big ideas to long nights drinking with friends to lots of casual sex to long nights working on projects.

Because of all this I left college far more well rounded and prepared for my career and my marriage. To this day the skill of how to make friends and positive acquaintances has stuck with me and been a majorly useful skill.