"She don't feel the same about us" - I would suggest this is a slang version of the sentence. "She doesn''t feel the same about us" - this is much better English.

I do something and or I don't. She does or she doesn't. She never "don't". NEVER. Unless she wants to sound uneducated.

Don't as in street version, a slang. You can use don't but doesn't is more suitable.

Although "don't" could be a mistake on the part of the writer, it is just as likely that the writer is deliberately writing the dialog so that the person appears uneducated.

ebonics