What she’s saying sounds like someone who cares about you but does not want to move forward romantically. When a person asks you to block them, tells you to find someone else, and says they’ll only hurt you, that’s not a test and it’s not a puzzle to solve. That’s a boundary. It doesn’t mean she lied about ever having feelings. Feelings can be real and still not lead to a relationship.
You can’t convince someone into love or into fighting their family if they don’t want to. Love only works when both people choose it freely. Right now, she’s choosing distance, even if it hurts both of you.
I know you feel like she’s “the one,” but someone who wants to be with you won’t ask you to disappear from their life. As painful as it is, the most loving thing you can do for her and for yourself is to respect what she’s asking and take space. This kind of pain doesn’t mean your love was wasted. It means you cared deeply. And that matters.