The Ugly Truth (Diary of a Wimpy Kid #5) by Jeff Kinney

Greg Heffley has always been in a hurry to grow up.
But is getting older really all it's cracked up to be?

Greg suddenly finds himself dealing with the pressures of boy-girl parties, increased responsibilities, and even the awkward changes that come with getting older - all without his best friend, Rowley, at his side.
Can Greg make it through on his own?
Or will he have to face the 'ugly truth'?