I mean, if she was going to leave wouldn't she say something? Seems a bit out of character to just up and vanish
Unless you knew her personally it's not out of character, who knows, she could have been a killer, a lawyer! anything really. lol
Also you gotta take into account that something could have happened to her, and there would be no way to know unless somebody here goes full stalker mode.
I dunno, just doesn't seem like something she would do, based on what we know about her from here. But you have a point.