Hey Zed, don't let a little sucking up undo the choices you have already made. When you made the choice to leave it was for very good reasons, those reasons have not changed.
Doubt is normal when ending an abusive relationship, you have been conditioned to do it.
Wrong, right, forget those labels, taking him back will put you back at square one, and leave you disappointed in yourself.
My advice, take the time to recover your mind from the abuse.