|A great piece of writing, in that I really felt there was some prior thought about where this was going and it came to a natural, organic, conclusion. Very good. In all honesty? I kinda could see this become something of a larger piece, expanded into novella format, but there'd need to be some changes for that to happen.
There's some hiccups in the timeline. Now, grant you, I might have just missed something. I'm reading this quickly, one time through, so I'll just go ahead and apologize ahead of time if I missed something blantantly obvious. I get the impression that they are lying next to each other when they first meet in the loft, even though Mathius has brought food (how did he get that out of the house, totally?). I had to reread it and see they had not had a quick moment of whoopie and Tad was snoozing afterwards...that might want to be ironed out a bit more, but it's okay.
Most people in the Hudderite community are allowed complete freedom at 18, away from their faith, a weird time called Rumspringa, or the Devil's Playground. They usuall buy a house and the youth go there. They indulge in a great many things, free from the church, and, after a period of time, are allowed to come back, if they so choose. A time of sowing some wild oats, as it were. Why hasn't Mathuis gone through this? He would know he was gay at that point-the Amish and Plain People are a bit more accepting of this in manners I don't totally understand-and he may have already suggested to his father about it.
I'm unsure if Tad is part of the parrish that Mathuis is part of or wholly an outsider, or, well, they'd probably call him "an Englishman." A suggestion would be that he truly is an outside of Mat's culture. And you can illustrate it with the language. Mathius' language is a bit more like I would expect other kids his age speak-when, in reality, he'd be more steeped in the culture and probably speak more formally than Tad, and break off common German phrases on occasion.
Whatever the case may be? YOu have something here. Maybe flesh it out more, if you're interested too.