I'm thinking of continuing a relationship under the false pretense of marriage
You want to continue a relationship under the pretense of marriage?
No, I want a real marriage.
You need to make sure you both are on the same page and want the same things. It's only fair and will make the relationship go more smoothly.
What if I get into a marriage and then decide that I don't like her anymore?
Well that's why you should first make sure that the relationship is real, and not just do it for the marriage or else you will get a divorce. Spend time with the person that you love for a while first, and make sure that it is real love.