After my very similar ending, I found this article amazingly helpful:
www.powercommunicating.comIt made me angry enough to go NC which I believe is the only way to take back control and get your own closure when they do ST. It's punishment and control and it's awful. It's the way my relationship ended too, with no official break up - just silence because I wouldn't accept his bad treatment of me. Hugs as I know how painful it is. Don't blame yourself - sounds like you were generous and giving and no way do you deserve to be treated this way.