Dude, YES! You are NOT alone! I just hit that time too, and man, it feels freaking amazing!
Finally beginning to identify with the right gender, getting excited for the future events that are going to occur, like being able to go SHIRTLESS places. And being called "Sir"!
And of course, SIDEBURNS.
I'm right alongside you, bro, transitioning into the wonderful, manly world of body hair and picking up chicks with terrible pick-up lines. Or dudes, if that's what you like!
Stay strong, live long and prosper, and GO FOR THE FREAKING GOLD MAN!!!!