Oh, I'd really recommend some time....
Some men (and women too) can really impress new friends and potential mates...but it is an act for them, and they cannot maintain it all the time. In other words, their personalities won't be that flexible in other areas of their lives, so that is where the hints are for you to find. I think you are already onto it.

Here is a link that was really useful for me a few years ago, when I was totally trashed by a "friend"... I now can recognize the signs.

This link is very user friendly, and easy to understand:
See if any of it pertains to your situation...
http://www.halcyon.com/jmashmun/npd/
This is more common in males, 3:1 compared to females, but when this type "turns" it can get really ugly!
(and DON'T let him see you reading this)

The anger thing is significant I think. I grew up with a paranoid mother, and that was a terrible experience. Road rage, overly strict with children, being sensitive to what others look like or how they are acting towards the self....cringe...