And also how can you tell if she's over her ex?
Most Helpful Girl
When she is not over her ex: she talks about him a lot, compares you to him (even if it's in a positive way, like "Oh, you're so sweet and thoughtful! My ex would never have done this for me!"), she harbors a strong hate towards him (there's a thin line between love and hate, remember?), she keeps in contact with him (this is not a definite sign though, as some exes can remain friends, it's only a sign if she seems to be more reliant on him, only talks to him to make him jealous about something, etc. ).
When she is over her ex: She feels nothing towards him, neither love or hate, he doesn't cross her mind, he's just "some guy she dated for awhile" to her.0