Besides lying and using people, NPD characters will boast a lot about themselves and make everything about them inappropriately.
I don't know if your friend has NPD. I have a sister with NPD and one with Borderline Personality Disorder, and they both lie and use other people but have two different disorders.
Either way, your friend sounds like bad news, a lot of times you don't know who your real friends are until something bad happens to you.