You are a really good person who has had all of your decency and kindness used to manipulate and exploit you. I don't care what he does for a living or how many languages he speaks, clearly he is most fluent in asshat and shame on his sorry butt.
You will get through this and someday you will look back and wonder why you ever cared. Sending you a big fierce hug.
P.S. So, are you making payments on that piano? Because you might want to let it be re-possessed...