I had fun: I cheated, I skipped classes, my motto was "minimum effort, maximum freedom." I went out a lot in Amsterdam in order to get my social fix and a read on what it means to be social (long story short: if you don't like going out that much, go to places with more interesting music -- jazz, classical, opera, finger style guitar etc.)
For me the fix was obvious: travel in Europe and make friends. It was obvious because I had a huge hunger for doing whatever I wanted as opposed to other people dictating it to me (e.g. set curriculum in high school).
In the end those friendships were short-lived, all of them. But those friendship did give me the validation of that I mattered (and the insight that everyone matters really). When I look at Japanese high school animes, I think of the time where I felt lost in other countries, and gained some friends who showed me their world in all their wonderful idiosincratic ways.
I'm not saying you should travel. I hope that my story just gives some inspiration.
In your youth you can follow your desire, the older you get, the more you'll have to follow responsibilities.