She’s totally into you if she’s from the Deep South

You must have sounded like a brother to her.

It looks and sounds like she's using them interchangeably. Bro/brother. As a term of endearment as in "good friend" but also someone completely platonic. We do this here as well. If you're so unsure, why not just ask her straight up? What are you asking us for? We can't possibly know her true full intentions because we're not her, so to know for sure, just ask for clarity 🤷🏾

Believe it or not I have had women sleep with me just because they liked my vehicle

She's friend-zoning you.

If you are interested in her romantically, this is a red flag. What she calls you is how she views you.

My dude. You answered your own question there like three times.
You saying you're annoyed shows your faking being her friend when you're wanting something else.