Why doesn't my girlfriend never want to see me in person but will talk to me on the phone or text?

Anonymous
Sooo...I met this girl on fb around late may of 2012 and we've been talking ever since, August 3 2012 is when we made each other official to one another, we can talk about any and everything she makes me laugh like no other girl has, she's sweet, kind, and overall a very nice well rounded person...But there's a few things that she has told me;

1. she has a 6yr old son that she got from sexual assaulted(raped) and she's only 17, with no whereabouts of knowing the victim of the incident

2. both of her parents have passed away, and she lives with her sister and brother-in-law and is/or constantly with family members(grandma, grandpa, uncle, various cousins)

3. there is a lot of emotional stress like depression, anger towards her parents because the way they treated her and the mother tried to perform miscarriage on her as the mother was pregnant

so anyways back to the story so there were numerous occasions where I was suppose to see her and hang out "in-person" and things never followed through...either she makes an excuse of some sort or won't reply to me, (via phone, twitter, Facebook) if I'm telling her I'm omw to where she wants to meet up I won't here from her till the next day I've talked to her sister, her cousin, her ex best friend, all on fb but never seen any of them in person

my 1st concern is any of these people real? I mean she told me what school she goes to, what classes she's taking, she takes pics with the family members and posts them on fb and instagram or she'll send me pictures of herself, she told me about her exes and their were photos of them together and what not, there was a fake profile page of her and many people were lashing out at the person that made the profile calling that girl a phony so she had people on her side, like those were things I've gathered

maybe I'm just to bent on never giving up? like we've talked from may till November and I've never seen this girl AT ALL not even walked by her but people from her school(friends) take pics with her and talk to her on social networks and hang with her but I never hang with her.. when I brought it up like why haven't we seen each other what's really holding you back and keeping you from me she gets quiet and says "...idk" or she usually leaves me in dead silence and finds an escape route from that topic and tries to start a new convo like I just wanna know with the things I listed with her past could that be psychological thing she has? but she's been with previous boyfriends and what not? so does that answer my question with her being real and not a fake? why is it only me she avoids? or do I just need to wait longer for us to find the right time Because she told me she goes to HS still and is working as a nursing assistant? am I pressuring her too much on the fact of seeing her? like I have so many dark spots I have not filled I don't know what to think! I don't know what to do
Why doesn't my girlfriend never want to see me in person but will talk to me on the phone or text?
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