The person who screenshotted this had to have done it at different times (notice the time frame and battery) and somehow some of them are with LTE and some not. If it was fake, wouldn't two people text each other in one go? That's hard work.
Seems legit
They're uploaded to the Tumblr on different days/months. He probably just keeps it updated once he gets new texts from her.
Bless you dont know these cases from your sorroundings. I know a man (now 25) who was kicked out of his home at the age of 18 just because he was a gay.
Is this real? it looks fake, I mean her grammar alone. Short, incomplete sentences with simple verbs and lots of exclamation points. She sounds like a typical 11 year old on twitter.