I don't know if you will check back with this thread or not. You are so young yet and so is this young man.

Narcissism is not something "bad", that word seems to get tagged on anyone who might be strong minded, have strong opinions and be selective and work hard on themselves.
There actually is such a thing as "healthy" narcissism. In fact you were stoking your own narcissism when you gave a list of this young man's credencials and how you would like that kind of guy.

This guy IMHO, was burnt and he never wants to go through that again, he is "still" very angry about it too. He may not even "trust" his own judgment, it could be that he liked you but, is remembering how he at one time liked his ex too, so his way of saving pain was to do that test. Yes, that ex could have very well been psycho jealous. See, you don't know that, that is what you are "not" seeing.

Sometimes people do those things because they are just plain "angry" and "hurt". People can be mean when they are in that state of mind. Male or Female, some individuals can be possessively "toxic" and very hard to get away from and do ugly things.

If something like that happened to you, you would want to make sure you knew the type of individual to stay away from too.

The only thing you "could do" is text him back and say, " Wow, I am so sorry that some girl was psycho with you, it must have been awful for you. Relationships are hard, hard to trust and make sure one doesn't end up with some psycho. I wish you luck in getting over that bad relationship, because aside from your angry test, you seem like a nice guy. Yes, aside from that it was nice getting to know you and spend time with you". And then say nothing more, even if he doesn't text you back, leave it be.

As I said, learn from this experience, be honest about your part that added to his anger too. Don't test people by threatening a breakup either, and don't be too quick to commit either. You keep developing and finishing your education, often in the process a young student learns things about relationships too. But ask yourself, would you want a very possesive person? You need breathing room too, learn about "boundaries" otherwise you could give yourself to the wrong person like he did and be just as angry.

Ask yourself with this experience though. How needy am I?
Am I insecure? And that isn't about him, just you in general because you "are" young yet.

Sometimes an experience can be a "good" lesson. I could be like others and just give you hugs and so sorry's and blame it all on him and NPD or something. But, that isnt going to help guide you in a growing direction, it will just say "you" did everything right, which you did not.

His test was not nice either, but I can see his age too, and that a test like that can be coming from "hurt and anger".
The early 20's are just coming out of the teenage years where most teens are still narcissistic all about "self and one's own universe" which is a normal part of development.