Taking responsibility means to stop blaming others for your mistakes. You ignored the red flags and you fed the beast, instead. You're part to blame for being in a toxic relationship. Accept your mistakes,.. forgive yourself,.. and move on. Not an easy thing to do, but you can do it!
This could not be a truer statement. You're caught stealing. Then, instead of doing the right thing and admit what you did, you start blaming other people - because nothing is ever your fault. EVER. The mistakes don't make you a bad person ... the fact you don't own what you do and you try to drag others to your level does.