hloly shit man, you're growing up. congratulations.
regarding the spirituality + "getting rid of negativity" -- good goal but don't get any illusions-- we all have "negativity" but the goal is not to get rid of it like one would disinfect an operating room, but rather to use it as a fertilizer of sorts.
i can't explain this very well much less on the interwebs but before you embark in a quest for purification that could get crazy, check out this book.
http://www.amazon.com/Little-Book-Hu.../dp/0062548476
trust me, it's pretty good. best wishes.