Jamie genuinely likes Jono, and thinks that he's a good chap. The only reason he hesitated when he wandered in on him in the Sensoriums was because of the whole Darksoul thing, and it had nothing to do with Jono himself.

He's still very grateful that Jono was there to help save him from the fire, even if he doesn't really remember the rest of what happened on the mission that clearly, and if something happened where Jamie had to help Jono instead, he definitely would do so.