Guys, how do you know when she is over you?

So I would another guys opinion on this.

When do you know your ex girlfriend is over you?

If she ignores your calls? It's kinda a rude thing to do. If she really didn't care, why be rude and ignore?

When you two are dating other people? She is dating another guy so it's okay now to be "friends" or is she trying to make you jealous?

If she responds to your calls, texts, messages and is friendly but it's like artificial, acquaintance, some chit chat?
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Oh yea, I know the little things girls do to move on. But I wanna know when other guys know, in their hearts that she is done with you? Yeah probably when she says things like you were a mistake, or when she won't acknowledge you when you 2 see each other
Guys, how do you know when she is over you?
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