Am i crazy for wanting to paint my entire bedroom in sherwin Williams
naval?

Nope. :-D

(And, technically, your entire bedroom won't be painted navy, if this rendition represents your intentions, since your ceiling is still white.)

Everyone is telling me it will be too dark, but I love the drama
of this color.

When friends and family told me the same thing in my first house (I went dark green), I asked them, "Most of us *sleep* in our bedrooms, so why is 'dark' an issue?" lol

Thanks so much!