So hell froze over today

So I was talking to an old, ex best friend today and she gave me some information that was either false and/or disturbing. She told me that her relationship with her long time bf had ended 2 weeks ago (not at the disturbing part yet) and that she realized that she was in love with someone she had known for years and plans to move in with him asap. That someone happens to be my ex boyfriend (this is the disturbing part), the first love of my life.
Now I had dated this guy years ago, but it was a horrible one, that left a fair bit of scarring. He cheated on me and broke my heart. Everyday I dated him she would tell me to leave him, and with good cause. He's a loser, perhaps a puesdo intelligent one, but none-the-less a loser. He's never employed, does way too many drugs, and tries to fuck anything that crawls, and that includes girls ages 12, 13, 14 and up, oh and boys too.
Now, I hung out with him not too long ago to see if anything had changed, and it hadn't. He still tried to hump me and the only things he would talk about was his drug usage and American Politics.
What the hell is wrong with her! Either a) she's lying or b) she's just plain fucked. But to lie about something like that you'd have to be fucked as well anyway. It's just a shock as she seems to be an intelligent, ambitious women with a great future. Talk about eating at the bottom of the food chain.