...why?

Another sleepless night and no end to mental diarrhea in sight.
My head just won't stop!
My life is on its way to taking the shape I've imagined in my wildest dreams. Loving boyfriend, no severe health worries (touch wood), supportive friends and a move to an exotic, new and interesting location on the horizon. On the plus side, once the move's completed I'll have time and the economic resources (thanks to my man's generosity) to follow one or two distance-learning courses that have tickled my fancy for years, on the less-plus side I'll be totally dependent on the man whose only proof of commitment has been the continued demonstrations of his feelings for me.
And for some reason, I can't even quite put my finger on it, I'm missing something.
Only two weeks ago, I was tempted to write a post on why I think relationships work or don't work, namely that it depends on how much patience you can muster, how much independence you bring to the table, and how much respect, and love, you have for the other person as a whole. In my opinion there's always something that'll piss you off about any other person, so the sooner you realise whether or not your partners' oddities are seriously getting in the way of your big picture, the better. As a society, I think we're pretty quick in giving up on things and on people. Once you find someone you can care about, it is my belief that it's worth your while checking out twice just how much you'd let go of once the inevitable "do I really need to put up with this?" thoughts come creeping out of the woodworks. Always helps to remember their positive features, why did you like them in the first place, and a good long hard honest look at what they're putting up with from you. Cos chances are, you're odd, too. So, keeping all this in mind, I thought I had the answer to the riddle how to make things last between you and your man: love him, tell him so, and learn to accept and appreciate his way of showing you the love he has for you, without trying to make him jump through romantic hoops that are just not in his DNA.
But now, I find myself worried at all the changes we are facing as a couple. Roles will be rather traditional, the man bringing home the bacon and all, and the woman being at home - but without the brood to take care of. Does the lack of offspring make me superfluous? No, because this particular man doesn't want offspring. But he does want me in his life. At least, for now. And apparently I won't even have to feel bad for taking his money and using it for my education and past-time.
I don't know folks, I want to see all this as the crazy super positive development of unlimited possibility that this life with him is, but I guess I'm just a bit scared. I don't want to change continents without having thought things through thoroughly. (try and say those last four words out loud, and fast, tee hee.) Because if I just go with my gut feeling and think everything's going to work out fine... then I may be faced with a hypothetical problem I haven't got a hypothetical solution for! Shocking! This is a big life-change though, so all sarcastics aside - I wonder where I'm going, cos I kinda can't feel my legs.