You are posting too much personal info about someone over the internet.
Ah, give him a break. People are posting this kind of content all over the internet now. Just in places a bit more tailored to it (Relationship/Dating forums for example). If anything this is just a weird place to vent to this kind of extent.
It sounds like this girl is bipolar, I would advise you to steer clear, because this isn't going to change. Rule of thumb is; if you have to ask anonymous people on a forum for relationship advise then you should end it. Most posters are merely looking for affirmations to keep trying, which is ultimately futile anyway.