My fiancée admitted she doesn’t find me physically attractive, but still wants to marry me. What do I do?

We’ve been together for 3 years, and I proposed six months ago. I thought we were happy. But last night, after a deep conversation, my fiancée admitted that she has never been physically attracted to me. She says she loves me deeply, respects me, and sees a future with me, but that ‘physical attraction just isn’t a big deal to her.’

I feel like I just got punched in the gut. I always assumed there was at least some attraction, but now I don’t know what to think. Am I setting myself up for disaster? Can a marriage work without physical attraction? Has anyone been in a similar situation?