To answer your original question: I stepped back at one point in my life and looked at the relationship I was living in. A life with a man who was addicted to alcohol and drugs, emotionally unstable, stole, manipulated me, was verbally abusive, spent half his life on the computer, didn't help support the household, and eventually had a criminal record and bankruptcy.
Did I stay? No. It took a while for my value system to kick in and point out that I wasn't living in anything like the marriage I'd signed up for. I loved him but did not respect him any longer, and I realized that the only chance I had for stability and love was to move beyond him.
I eventually found myself in a relationship with a man who was honest, financially & emotionally stable, loyal, protective of me, and loving.
That's just me. Since you asked.
Your situation may be quite different, but trust your gut instincts. I ignored mine for soooo long.