I'll probably go home and cry myself to sleep tonight over it, and it'll take me a while to rethink and revise my future, but I'm not going to let my life go to hell in a handbasket over a man. Even if it was a man I loved dearly, and was planning to spend the rest of my life with.
We can both be grown up about this, okay?
And even if I didn't deserve it, it happened, and there's no point in dwelling on it. Sometimes bad stuff just happens. It's life.