He's tried his best to ignore it! Spencer & Jon hadn't seen anything wrong with it despite his very deep misgivings, but now OH NO THEY ARE GOING TO MEET UP and this whole thing is going to explode in their faces, Ryan knows it. Shane might be (probably is, because it's the Internet) a sexual predator.And they're going to meet.

... Ryan feels vaguely guilty for feeling more sulky than worried, then decides he's probably repressing his feelings.