Love, Simon: Simon vs The Homo Sapiens Agenda by Becky Albertalli #1

Straight people should have to come out too. And the more awkward it is, the better.
Simon Spier is sixteen and trying to work out who he is - and what he's looking for.
But when one of his emails to the very distracting Blue falls into the wrong hands, things get all kinds of complicated.
Because, for Simon, falling for Blue is a big deal . . .
It's a holy freaking huge awesome deal.