Question

I need to write an essay for school about the book of the Perks of Being a Wallflower. The essay needs to be about my opinion and sort of like proving a point of the book and be surrounded by the theme. I really enjoyed the book. In the beginning, I felt kind of uncomfortable, awkward, and just didn't know why I chose the book to read in the first place. But then, towards the middle, all the pieces started coming together and I started loving all the characters and the plot. I just don't really know what to write my essay about because I have so much thoughts about the book.