My fiance has huge student loans, around $170,000. Can I get a Pre-nup so I wont get stuck with part of his loan if we divorce?

I'm getting married in a few months and my fiance has over $170,000 in student loans. Is there a way I can get some sort of pre-nup? If the marriage ends I don't want to get stuck with any of his student loans. I have no student loans because my parents paid for my schooling. I know this sounds really bad, I love my fiance, but I don't want to be in debt for the rest of my life if something happens to our marriage.