Is it rude to tell someone you don’t find them physically attractive?

Even if they find you extremely attractive but you just don’t like the way they look. Like they don’t look physically appealing to you or they’re just not your type. I keep thinking about it because if someone told me they don’t find me physically attractive then I’d automatically think they thought I was ugly.
Is it rude to tell someone you don’t find them physically attractive?
Updates
+1 y
I should’ve been more specific. If someone won’t leave you alone because they want to be with you and you’ve already told them nicely that you don’t like them but you never said why, would it be wrong to say “I don’t like you because I don’t find you physically attractive” in my case it’s I have a boyfriend but if I didn’t I still wouldn’t be with you cause you aren’t my type.
Is it rude to tell someone you don’t find them physically attractive?
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