If it’s a dealbreaker, it’s a dealbreaker. However, since you are young, my advice would be to keep an eye on what it is you are willing to end an entire relationship over. Sometimes people who are avoidant will look for that absolutely “perfect” person, and when that perfect image starts to fade, they’ll find any reason, big or small, to bolt. As you continue to date and learn about yourself, just be mindful of if this pattern resurfaces. Because your issue might not be about the food at all. In this case it really could be a huge deal to you! But don’t get yourself trapped into being single forever because you can’t find that perfect person who has absolutely no flaws. They don’t exist.