Not everybody has the same level of intensity or the same time clock. It sounds like you want him to be as intense or as deep as you are [i]when[/i] you are, and either he’s just not as interested as going there as you are, or he doesn’t have that level of intensity like you do, or he simply isn’t in a place in the relationship where he is inclined to do so, while you are. It also may simply be that you’re looking to him to fulfill all your needs and if you looked to others for those intense conversations you want to have with him, and instead, simply accepted him as someone who isn’t that deep or doesn’t want to have those conversations with you, you could make it work.
Whatever it is, the ball’s in your court and it’s going to be more productive for[i] you[/i] to make changes, than it is for you to hope he will. In other words, if you can look to friends and family to fulfill some of the needs that you’re currently hoping he will, you may be okay continuing to date him. Or if you can hang in there because this is who he is and that’s enough for you — or because you understand that he may reveal more of himself in another year than he has now (especially since he’s only 19), then you should. But…. if you’re so bored and frustrated with the relationship that you become cranky and negative, then let it go. Really nice people aren’t always compatible people. You’re someone who’s looking for more and unless you can hang back and let him be who he is, you should find someone who’s more intense and passionate.