2 months of knowing someone and you are borderline depressive over an attractive drug addict?
I respect and admire your desire to help a person in need, but she's not the only one here that is sounding like they have an "addictive" personality here...
I know I'm going to come off as a "Grade A" [censored] here, but you might consider that I've done my fair share of substance abuse in my younger years and lost a close friend to that lifestyle. I also watched an ex-girlfriend (with whom I had a relationship with of 18 months) fall down the same path and tried to help her out of the "habit", with no success and a great deal of personal pain to show for it...
If there's one thing I can state with little uncertainty, if she's been doing crack and you've only known her for 2 months, YOU DO NOT KNOW HER AT ALL. Period. End of story. I don't care if you've spent 24/7 with her joined at the hip, YOU DO NOT KNOW HER. There were times I barely recognized myself as compared to who I was before I started playing with dope. The same goes for my friend who's life still revolves around getting blitzed, as he's night and day different than what he used to be.
If you've established an emotional attachment to this degree where you are becoming depressed and physically ill, I would suggest getting help yourself as this isn't natural or normal for one to be going through to the degree that you seem to be, especially in a situation such as this. I would go so far to say that you aren't seeing her with clear eyes or thinking with a clear mind, such is your desire to help and your infatuation with the idea of her. Furthermore, I would suggest that her physical attractiveness to you has even further handicapped any ability at concise and logical thought on your part here.
If you are doing things the way I did them with my ex, you are setting yourself up for one HELL of a hard fall and ARE NOT doing her or yourself a bit of good here. Baring your soul to her at ANY stage in her addiction isn't going to do a DAMN thing to get her to quit her errant ways. Addiction just doesn't work that way and more often than not it will FURTHER support her addiction in that she knows that you'll do just about anything to support her. That ESPECIALLY goes for emotional support.
Here's where I become the Devil himself:
I never did crack, but I've been told it's probably one of the most difficult addictions to kick. With any severe addiction, the person addicted has to hit BOTTOM more often than not.
Physical, spiritual, emotional ROCK-BOTTOM.
Addicts usually have to face COMPLETE and ABSOLUTE abandonment before they see what they are doing to themselves and others around them. It sucks, it hurts to do this to someone and it makes one feel like an bloody ghoul. Furthermore, there's no guarantee that they won't sink into utter depression and despair at this stage and ultimately try to end their lives. Ultimately, that may be better than the utter husk of a being that they may turn into...
I served as a shoulder to cry on, a place to crash and burn, a pick-me-up and a WHOLE slew of other things for my ex for close to a year. I professed my care, my support, my time and my energy, all of which was gladly accepted to keep her balanced out until she was semi-sober enough to run off to get her next fix.
All I did was to merely further her downward spiral and act as a crutch for her activities. The damnable thing about it is that I was told by a number of people to ditch her and kill all forms of support; told by folks who went through this before with someone else they loved. I was too smart and too determined to listen (translation: too hard-headed and blithely ignorant), though, until an abortion was brought about by my "support" and "caring", in combination with her "habit".
Of course, I wasn't let on this dirty little secret until months after it had happened and it was the ultimate moment of clarity and focus for me when I was told of it. It is what finally opened my eyes to what I allowed myself and my blind, shallow love and support to become privy to.
Your situation hits me in a tender area, as it brings forth a fair amount of deja-vu. I hope your episode ends up far better than mine did. I can't tell you what to do, but consider that I've walked in shoes quite similar to your own in this matter.
Long story short: get her ass in a clinic (NOT counciling) and keep your emotions and support bottled up for her until she cleans up. Trust in God, but know that God helps those who want to help themselves and sometimes not even then.