The speaker opens by facing the insults head on. "Run through" and "hoe" are labels other people might throw at her, and she shrugs them off with "call me what you want, because i know." She isn't denying anything. She admits she has chosen the wrong partners, started things she couldn't finish, and stumbled along the way.
The walls are her response to that. She built them after falling, as a way to protect herself. Yet the poem doesn't treat them as simply sad or lonely. They confine her "to me and you," which suggests a small, private space with at least one other person allowed in. She says she has never been happier, and that within these walls "they've seen the best of me."
The mood is defiant but also tender. There's some hurt underneath, but the main feeling is self-acceptance: she knows her flaws, has chosen her safe place, and doesn't need outside approval. The ending feels quietly content rather than bitter.