My automatic response when woken for this is "really... .what the heck... .you woke me up for that." Which I didn't say, But how RUDE & DISRESPECTFUL is he.
Good for you that you showed your displeasure. Still you answered his question, did a bit of jadE and rewarded his impulse to wake you up.
Sounds like either jealousy or surprise/irritation or fear of abandonment on his side. Considering that you are thinking of leaving in some time in the future he may be sensing abandonment.
You could of course validate any of that. I'm really surprised you fell for JADE being woken up in the middle of the night.
Seriously, your sleep is important and if that was a one of - let it go. If this stuff occurs regularly it may be worth putting a firm boundary in place. It could cost you a few nights sleep, possibly moves to the coach but eventually he gets that it is hopeless to interrogate you at night.
Keep in mind that communicating with pwBPD something complex requires you to be on top of your game. With respect to abandonment you are in a tricky situation. In the middle of the night you are not at your best. It may be worth considering a soft boundary when to engage in such communication and when not.