There has been a lot of focus placed on "narcissists" because of things Trump does and we all know he is constantly talked about and there certainly has been a lot of effort to label him.

That being said, it's important to keep in mind that EVERYONE has some narcissism and that narcissism is on a spectrum so people can exhibit some "traits" or characteristics that are described in the "label" when you read about it but it doesn't qualify that individual as a person with NPD.

It's better to focus on recognizing the red flags someone presents to you that reflect that person will not be a good match for you. From what you have shared, this guy is just not a good fit for you and just write him off and move on. This guy is probably not very skilled when it comes to relationships. Often a person will brag because it's their own way of trying to look important or worthy, it doesn't always mean that person had NPD.
Just saying.