Your question is very similar to that of the lady on the Coffee shop forum.
It seems that you two need to sit down together and share with each other what marriage means to you. Marriage may mean different things to each of you, but that doesn't mean that your fiance doesn't love you or value you. Try and listen to and understand how he views marriage and then try to explain to him how you see it and feel about it. Hopefully if he can really understand how deeply it matters to you then he will be willing to marry. If not then you need to ask yourself whether his commitment to you is strong enough.
You might also consider doing some sort of marriage preparation. You can find resources for
marriage preparation on the site. Resources like
FOCCUS and
Prepare/Enrich can be done even if you are not yet committed to getting married. They can give you valuable insights into your attitudes and your overall relationship which may help you to decide what is the best course for the future.