a happy life & healthy family should be built on some basic foundations. Like loyalty, family economy, yours personality etc. And b4 u fall into the relationship, u gotta make clear ur mind n see if she fulfills the critiria of your "foundations". if she does, go ahead n everything would be fairly smooth i bet. but if she doesnt (or u dont fulfull hers as well), the foundation will not be stable and ur relationship will be collaps n as a result, no happy life, no health family indeed.
it's very simple, but not easy to follow. cos we may fall in love easily even by one sight n without taking the "foundation" in account.