Would you marry a plus-size woman and share your life with her?
Even if my preference would be thin women instead of a larger woman I'd still not marry her, because I don't believe in marriage period. Unless she really insisted. For me it's like this: Marriage is a concept made by humans, love on the other hand is not, it's just there. I don't need a man-made concept to confirm my love for a woman, love itself already does that, and should do that; if not, then the love is not real in my opinion, or not strong (enough).