it's not uncommon. while some students enjoy the classes they take, other students find something the school offers to help them through their high school years. they did sports, music, social clubs, work shops, or other extra curricular activities to help them get through besides just classes. and with that, more friends are usually made, as they are easier to make than out of thin air since they have the same interests as you.
maybe you just didn't like the mundane schedule of going to school every day between 9-3, but knew you needed it to succeed in life, so you stuck with it.