Good for you! That's a consequence and most of us just talk. You are correct it's an overused word. If you read another piece I wrote called "Narcissism is a Serious Word" you can understand the disorder more and distinguish between Narcissistic personality disorder and narcissistic characteristics but the critical distinguishing quality of a true narcissist is a lack of empathy. Your boyfriend could just be someone who got away with not having to be accountable or have consequences growing up, or be a bit spoiled. Read that piece it will give you some further insights.