Jason was very much not normal, but he was good at coming across that way as long as you didn't question him too closely. It wasn't like he blurted to everyone he met that his dad was Jupiter, Roman King of the Gods, or that he could summon lightning bolts (although doing so kind of kicked his ass) and fly. Among other things. He actually liked keeping a pretty low profile.
"You should. There's no way out. Lots of people have tried. So you'd better try to make yourself as happy as you can here, until someone finds a way."
If someone ever found a way. Thalia'd been here for over three years, so who knew if they ever actually would?