Are you conflicted about finding someone you rationality don’t find attracted to, attractive? Does it feel like you’d loose your life as you currently know it, should you end up in a relationship with them because they’re so different, resulting in you loosing those other people you refer to?
You sound like you understand the differences between both people well so that’s good. Our hormones are crazy things that throw all sorts of emtions at us! Maybe try to see this as an exercise in finding/securing what you want in life, what people etc. You clearly see this other person as not your type ultimately, but they still have that ‘thing’ that makes you a bit giddy! Enjoy it for its silliness, safe that you know you’re highly unlikely to actually choose them! :)