oh HopeCA - I am so sorry to hear that. It must be crushing. I can see that you're shocked and also perhaps not surprised - and I second everything Yorkie has said. He might have any number of reasons for what he's done and the way he's failed to communicate to you about it. Any number. And none of them make it okay, and none of them change what is the healthiest thing for you to do next.
Perhaps now is the time to let yourself be angry. It can be damaging and corrosive and ugly, but it can also put the fire in your belly needed to get yourself out of a bad situation, set some boundaries, and make some positive changes for yourself.