Most Helpful Guy
This... sounds not good. This sounds like he has already checked out of the relationship. I think he has already ended it in his mind, but because you are long distance, he doesn't feel he has to. He can just sort of limp along and see what happens, without putting in any effort. If you two were actually physically together it would probably come to a head and he would have to do something about it, but since you are not there he can just sort of 'half-ghost' and not worry about it.
If you don't text him for a while... yeah, it could drift him away more. But I think he has already drifted away too far. Really though, it can't hurt. Stop contacting him. See if it jars him out of his complacency. If it doesn't, you'll know it's over. If it does, you might be able to salvage something. He is clearly taking you for granted and just assuming you'll stick around, that's pretty clear.
Most Helpful Girl
I've been there it sucks but it all depends on how much time u spend together talking. Just give him a little space for awhile and if things don't go back to normal maybe reevaluate the relationship