Wanting a book rec on self-discovery. I am 19 y.o. male and in

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Wanting a book rec on self-discovery. I am 19 y.o. male and in my first year of college. I have gone through many changes in the past couple of years, most recently reading many books on Zen and practicing meditation daily. However, it only lead me to nowhere; I no longer feel that I know who I am. I don't know what I want out of life, I am not even sure of my sexuality anymore. I am very moody, as I fall into an existential crisis once every week or so, and the next day I will end up feeling great.
As for friends, I have a group of about 4 people that I am decently close with at college but I feel I could have closer friends, I just don't know where to look. I take care of myself, I workout almost everyday and eat very healthy. I apologize that this has turned into a rant, but is anyone able to recommend a book that may give me some piece of mind?