It seems like this romance will definitely develop in Far From Home but in the trailer Peter also mentions concerns about putting his friends in danger.
Does becoming the next Iron Man that the world needs mean Peter has to distance himself from the people he loves, including MJ à la the end of Sam Raimi’s original Spider-Man?
The two were both snapped and can bond over that experience and it appears that MJ discovers Peter’s secret identity which should also bring them closer.