Most Helpful Guy
Guys are used to getting rejected. From a guy’s POV if you flip out over someone saying, ‘no’ it comes across as batshit crazy, clingy, controlling, stalkerish. It could remind him of someone he knew in the past who was bad news. Even tho, sure, from your POV it is just how you felt for a moment.
The worse thing you can do is keep asking him to convince you that what he said was true or to try and get him to say what you want yo hear. Just leave him alone till he contacts you.