advice on my flatmate?

Advice on my flatmate: Please help me as I'm at my wits ends?

How do I confront my flatmate as she is not 100% all there.

SCENARIO: I moved in 3 months ago, 9th of august 2011, she moved in on the 15th of july 2011, I'm a 37yo male, I work a casual job 15-20/ week plus I'm part time self employed as well as doing a 6 week, 20hr/ week course to gain better skills and education, so I guess you could say my life is busy and hectic, she is 32yo:

The lease is not my name, so I have nothing to worry about there!

But anyhow she is not telling me the complete truth, as I just recently found out she is in the arrears with the rent by $2140.00 (about 2-3 weeks ago) ("almost had a heart attack when I found this out"), the total rent for the premises is $350/week, my share is $120/week as that is all she asked for when I moved in, and I'm 1 week in front with the rent as I always pay rent up front and I have given her an extra week in rent, the last few weeks, I have been going into the real estate and paying them instead of giving the money to her, ("as she seems to be spending it on other thing's)!

But the biggest problem is that what she is saying to me and what the real estate agent is telling me is two different stories:

Real estate: have issued a eviction notice as of 9th of november 2011 ("she has not told me yet") as she has beeen telling me for the last week that if she pay's the rent+ an extra $50/week they are goining to let her stay, She told me a week ago she was going in to pay some money off it, and it was nothing to worry about, she reckons she had it under control, ( something about a friend lending her the money, but the amount changed within 24hrs, as it wen't from $1800 to $400 ("yeah right")! and the line of work she is in is earning her money ("I cannot really state what type of work she is involved with")! ("but she made about $400 within one day, but she is not doing the right thing with her money!'

Her: she has been promising the real estate that she is going to pay so much each week to cover the arrears ("But she has been telling them this for a couple of months now apparently, but has not has made so much of attempt to do so, all she has paid is a measly $150!")!

She does not seem like she is all there/ she seem's like she was dropped on her head at birth, Like 32yo female should know the ethnics, maturity and resposnibilityy,

She seems like she is not all there and thinks money is going to fall from the sky and all that type of bullshit, if that happened I would not be living the lifestyle I Live!:

But anyway please help me as I'am just about ready to throw her through a wall or snap her neck or something as she is lyining,deceiving *****,(usually I'm not like this, but when people piss me off, than that is a different story")!