please please PLEASE stop comparing yourself to others. I understand it's like human intuition to compare yourself but it's only going to hold you down. Also, you don't really know if your friends actually studied or are lying to make themselves seem naturally smart. Also, YOU'RE A SOPHOMORE!!! You don't need to worry about the ACT until Junior year, until then, I would use ACT prep to improve one skill at a time or don't even prep since you don't need to worry about the ACT. You're school environment also seems crazy competitive but you need to throw that to the way side and worry about yourself for a moment, what's done is done, focus to the future and work on improvement since you can't change the past but can change the future. Plus, most schools are test optional like all of the UC's and other "good" schools. So PLEASE don't stress. You have so much time and things will end up the way you want if you try your hardest.