But Herc, make certain that you're both happy, because if you want more than she does, if you're not happy - you may grow to resent that.
There's also the possibility that she wants it too, but is just worried about changing things. And then you're both afraid to do something you want, because you don't know if the other wants it.
I'm not saying that it's easy or it isn't a risk. But you have to be happy where you are. If you are, and that's enough, then you maybe don't want to do anything.