why it happened (let her know that i was needy, and a rescuer), her actions and behavior. i'm a stronger person today. i don't want to put up with her flirting with others. etc... .
or will this not be a good idea?
I don't know exactly what you mean, but you can only change yourself and decide to remove certain things from your life. You cannot make her behave as you like. You will NOT be able to "make her see the light." Accepting and listening will only have her continue doing it. Aggression and threats will only make her hide it.