You keep calling him a narcissist. Why? Doesn't sound that way at all. So he has a girlfriend. Yes, he might should have clarified that to you, but the fact that he doesn't feel meeting his girlfriend would be this intense for you doesn't make him a narcissist. Maybe not understanding of your thinking at this point, but that can be talked through in session. It is good that you are communicating your hurt and anger to him; now, slow down, sit down with him, and talk it through.