Can You Actually Tell if a Narcissist Will Be Back?

I want to know yalls opinions on this because I can't tell lol. I want to say I have an idea that my nex won't be back but I'm not sure. It kills me not knowing and not being prepared for a hoover. It's been a little bit over a year since I've seen her. A few months ago, she did call me to apologize and to tell me she wasn't trying to get back with me, but I'm not sure if she was bluffing or not. I haven't heard from her since because I told her I was happy and at the time, I was dating someone else. But even with all of this, I still wonder about a hoover, whether it's this year or 10 years from now.