What does it mean when a girl tells you personal things about herself?

Anonymous
Awhile back I dated a girl for about 2 months (if you could call it that). She had just gotten out of a relationship of 1.5 years cause her boyfriend dumped her. She was still in love with him, but they both started seeing other people. Even though she turned me down when I asked her out she still wanted to hang out all the time, cuddle, talk, go out to eat, go to school dances, etc. so when were talking all the time we go into pretty deep stuff like who she lost her virginity to, views on pda, life dreams (she almost told me about some horrible incident she was in that she told only 3 other people in her life about). All that was only after a month of seeing her and before that I was one of her friends and she of course didn't talk about stuff like that with just friends. A month later her ex (that she was still in love with and knew that) came back so they got back together and I was effectively rebounded. why would she tell me all that stuff? I know she wouldn't know she wasn't going to get back with her ex but tell some new guy personal stuff after only a month?
What does it mean when a girl tells you personal things about herself?
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