Okay, 1) a relationship between an illiterate tween and a grammar nazi would never last long anyway, 2) I find it interesting that the grammar nazi doesn't care so much about punctuation, as the ex gf has missed several commas and apostrophes, 3) so the ex gf was in her boyfriend's house without his being there? Otherwise she would have just told him right away in person instead of by text. How strange.
Although "pedantic" is more typically appropriate for someone who is overly concerned with educating someone, and the difference between "probably" and "prolly" is so well-understood that the guy in this comic is more of a nit-picking diction nazi than a pedant.
~Forever Alone Pedantic Moderator