<human>: Give me the gist of the text in a nutshell

I met a girl at work about three months ago.  She seemed really cool and the more we got to talk to each other, the more I thought we had in common.  

She would mention things like that she was going home to "hop on X-box Live" or mention obscure black metal bands that I love that she is also a fan of.  

I honestly couldn't believe that I had met someone I had so much in common with and before I knew it, we were hanging out at work a lot and soon texting with some frequency. We were kind of dating and I was close to making it something more official.  I told a friend about how I met this girl who was too good to be true and it turned out that her brother went to high school with her. 

I am not a facebook person but she is and she pulled up this girl's facebook profile.  EVERYTHING she told me was a lie.  She made up stories about her family being estranged from her because she wanted to relate to the fact that I no longer speak to my parents.  However, there were photos everywhere on FB of her and her family with captions like "I love my mom and dad!!!." 

All of her favorite bands were Latino pop music and her favorite movies were romantic comedies.  Nothing that we talked about was represented at all. She even lied about her ethnic background, telling me she was Native American and Italian though her she listed herself on FB as Puerto Rican. 

It appears that she was listening to my conversations with my co-workers about my likes and dislikes and making up stories. I think she was going so far as to troll fb pages of people she knows I am friends with as she friended some of them in the weeks that we were hanging out. 

I am so confused? Why in the world would she misrepresent herself this way? I honestly thought I found someone who understood me on a level no one else ever had.  What makes a person do this?
<bot>: Met a girl at work who seemed to be perfect for me.  Turned out she lied about everything she liked and I cannot figure out why.