That's in his head.
Just because he doesn't feel worthy and thinks everyone is after her, it only means that he's a paranoid psychotic and not that his world is actually tumbling in on him.
Kes barely notices how he's freaking out this week.
You think he's being possessive?
This girl used to be a SLAVE!
She feels overjoyed not to be chained up to a wall and beaten to sleep.
Her patience was infinite.
After Warlord, we don't know what happened, but right now, I'm thinking that he ratified the false brake-up and she cried her heart out wondering what was wrong with Neelix and why their love wouldn't last forever when to was certinly supposed to... Otherwise she might not have given him a lung so quickly.