Hi Broken. I say this very gently: There probably isn't any answer to why. Sometimes things that happen between people just don't make any sense., especially when there is some manner of addiction involved. Don't drive yourself crazy looking for an answer that may not even exist. Use it as a learning experience and move on. FWIW, I can tell you with almost 100% certainty that continuing your relationship with this person would mean more misery and confusion and heartache down the road. There's a cliché we toss around here at SR sometimes that is actually pretty true: Alcoholics (or addicts) don't have relationships. They take hostages.