Problem: It's not what he does, it's how he does it. I am a little afraid this isn't really a valid question to raise here and I apologize if it's not -- because obviously drawing convincing characters is my problem -- but I would just love a little input from some extroverts, or those who know them well on this. Particularly anyone who is or knows an ENFP, (because I'm geeky enough to have sorted my characters into Meyers Briggs personality types.) I'm a female introvert so sometimes I find this young man's head harder to get into than some of the others. I'd like some minor details of how an extrovert would feel when completely alone and unable to draw on anyone else for support, how he would feel about the people he had to lie to, etc, what he'd think others were thinking about him and so on. I thought, for example, the conflict between wanting to connect to other people and knowing he can't might manifest as feeling as if he's got a big sign over his head reading "LOOK! DESPERATE MAN IN A CRISIS! HE IS LYING TO YOU!"
Another reason I'd like some specifically extrovert details about this is that this is the sort of thing he's seen the other characters, including the missing loved one, do before - he's even kind of drawing inspiration from that. However those other characters are mostly daring but rather chilly introverts who don't trust people even at the best of times and are very logical, ruthless thinkers - so I want there to be a distinction in approach and atmosphere.
Research: Meyers-Briggs sites and message boards, e.g www.personalitypage.com/ENFP , memories of extroverts I have known, etc.