Naw. I think he's just realising that Dany is quick to fall for any man and is worried that a Dany/Jon relationship could put them in more danger with Cersei and even the Northern houses. Also, Dany listens to Jon now more than Tyrion. He must be jealous of that too.
Given how many of his plans have failed in the season it would be curtains for him when Cersei's betrayal becomes public.