This may be true for a majority of girls out there, but I don't think its fair to make such a general statement based on such a general psychological concept. If you give people the chance, they'll surprise you in many ways. On the other hand, if you always think this way you are likely to attract only this type of girl. This kind of mind set has never worked for me and if I got a sense that the girl I'm with is a "gold digger," I ended the relationship asap. Now I'm engaged to a very kind, caring, sweet girl who could care less what my paycheck is like and is more than happy to be an equal provider for our future family. This doesn't necessarily mean that she can't be a stay at home mom in the future if we're both ok with it, but the general atitude and mentality is what's really important. I always say keep your standards up and don't give into generalizations such as mentioned above.

As far as the original question... it sounds like you're just nervous about revealing your true feelings to her. You two have become very close and talk a lot and she is probably just as nervous about taking it to the next level. A lot of girls have the mindset that if they move too fast they'll freak the guy out and he'll leave. Just sit down and talk to her about this just like you have been talking to her about the other big things in life. Make sure she understands how you feel and what you want out of the relationship at this point in time. And above all try to make her feel comfortable and try not to make the conversation awkward. If she is really a soul mate type, she is most likely already thinking the same thing and waiting for you to bring it up. If she doesn't feel that way, then maybe she is a better candidate for a good friend. Either way, good luck and try to feel good about whatever comes of it.

Thanks