Either he loves you or he's playing one hell of a sick joke. I'm going to guess love though. If he hasn't said it yet, I'm willing to bet he will soon.
In related news, eight months is, for some guys, enough time to decide that he's with the woman he wants to spend his life with. So the fact that he's talking about it is not something that should be met with surprise. He loves you and is thinking seriously about how his future is going to look with you in it.
Hopefully you love him too and can see yourself with him for the long haul. If so, congratulations and invite your friendly neighborhood Mystery Man to the wedding.