I agree with nirvana.
You, and your girl, should not respond at all.
Keep watch. Sociopaths aren't crazy like you might think.
They are crazy, intelligent, know exactly what they're doing, and they
WILL mess you up.

For fun. They don't care-even when they get caught.
(I remember Ted Bundy. Look him up, if you don't remember.)


Those big words are there to advertise intelligence, and precision.
He is very specific in his use of meaning. Truly dangerous, and definitely not a fool. He is baiting you. Please don't fall for it.