I can't answer you that, being what i am but women, just like men, are individuals and there will be assholes on both sides. You live and learn to know the signs before you get attached and in the future, won't be in this situation.
Do you think she has any regrets or a conscience? Or is this simply a mean person!
The answer to that question really doesn't bring anything to yourself. A bit of time and separation will do all of what you are currently feeling, much unimportant. That is, only if you let yourself grow out of it. It is a heeling process. Like getting a drug or alcohol detox.
Btw, my belief is that there is no such thing as a soul mate or only one perfect person for anyone. It's bullshit that lazy and deluded people tell to themselves. My point. You had a nice 5 year relationship which brought something to you. It made you happy and fulfilled. But don't look at it like a party of your body or something you can not survive without it. You had a life before, and you will have a life after each and every one in your life. Rely on yourself. And accept life like it is.