<human>: Hey guys, obvious throwaway. My problem at hand is that my current girlfriend, who i've been dating for a few months now, has terrible anxiety and a dark side that's just beginning to show. Its gotten progressively worse, to the point that even if a night is going flawlessly, she almost always ends up throwing up at my place due to nerves and anxiety. I haven't known how to particularly touch the admittedly touchy subject with her, so i've kind of sat back, been supportive and let it take its course.

Last night though, she visited her friend and called me about two in the morning drunk with a rabbling message about her horrible depression which she's hid from me. She then, without realizing, started to vilify me and come at me for every word spoken. Admittedly, I know some of it was drunk talk, but this is the darkest I've ever seen this usually bubbly, outgoing girl.

Today she warned me that this is just the tip of the iceberg of how dark it gets, and while it scares me, I'm willing to stay the course but she vows to box me out of it, for they're her problems, not mine. I want to be there for her, but she is making a point to keep me uninvolved.

Which brings me to my question, do I stay the course and hope that she'll eventually let me in or do I back out knowing it will only get worse? 

Sidebar: She's the sort of girl who would solve the world's problems before even thinking of her own. She also got out of a five year relationship around 6 months before me and it ended with him cheating on her, so there's some lingering problems on letting someone in on that front. Also, she has lost a substantial amount of weight and has a fluctuating self image. Furthermore, I can be a bit of a blockhead and say stupid things, not mean mind you, in crucial moments followed by hours of apology, in an awkward more depressing Larry David sort of way.

Can you succinctly summarize the text in 1-3 sentences?
<bot>: Girlfriend won't let me in on her emotional issues and i'm not sure if I should stay the course and hope for the best or check out and be a friend.