"I told my AH to pack his things and get out.. I found out on his google play account (I warned him before that if he spent another cent he was out)"
It sounds like you have followed through on your consequence. I have been very guilty of throwing away my "emotional sobriety" over the actions of someone else. When I look at my part in it I usually realize that I knew exactly who/what I was dealing with but just wanted it to be different. I would set boundaries and then get SO upset/incensed when a behavior occurred. I FINALLY realized that I could save myself a whole lot of upset if I only ahered to my boundaries and the consequences I put into place.
How come people do what they do? Because they have issues. And when you are dealing with an addict - insanity is doing the same thing over and over again and expecting different results.