Nah, I was using the term "pathological liar" in the loose sense of the word. It wasn't that he couldn't tell the truth, and he would if he needed to, it's just that he didn't feel the need to, that often.
He never stole from me or cheated on me (as far as I know, and I don't know when he would have done it--he was always THERE), it was just a matter of impressing other people (or trying to) (including me). Could be mister charm when he wanted to.