She's toxic, right? But..

Was she toxic before you lied to her about another woman?
Was she toxic before you took advantage of the trust she had for you?
Was she toxic before she kept forgiving you for hurting her over and over again?

She was not toxic. You DRAINED the fuck out of that woman
You hurt that woman. You lied to her and continued to hurt her and made her question her worth and how dare you to expect her to be the same person she was in the beginning?