I have dated somebody with depression, not quite like the one you experienced but rather just bouts of it, he would just sink into it for a week or so and then snap out of it, and it's tough. You want to save your loved one but it's difficult to do so when they don't seem intent on trying to themselves. It gets to the point where nothing you do establishes any results. You have to be pretty unconditional and patient, even sacrificing if you want to take on a relationship with somebody suffering from depression, not to mention you have to be extremely understanding - they just become almost zombie-like and lose interest in life, they can't seem to muster up the will or energy to go about with their daily routine, everything becomes impossible, they feel emotionally drained and numb and then push you away - how do you help somebody when they don't even want you around?
Yes, she needs some professional help but this isn't a cure, unfortunately there is no cure, pills can elevate your mood for a while but the depression is always there, you can't run from it. Her choosing to walk away from you was a very unselfish act on her part, taking in consideration her earlier feelings and insecurities regarding you abandoning her. She knew she couldn't drag you down with her, which is exactly how the guy I used to date felt, that he was unworthy of me, that I was wasting my time with somebody like him, even though I tried to reassure him otherwise. I don't know, maybe you should let her be, let her figure things out and stabilise herself. If you do truly love her though, you should consider taking her hand and accompanying her through her darkness - sometimes they need proof that somebody cares - be there as a shoulder to cry on, somebody that she can talk to if ever she feels like it. I know it's frustrating because for the most part they become withdrawn. Or they are like almost possessed but just remember that they can't quite understand it themselves, it's an illness, they may say or do things in the heat of the moment that they don't actually mean, they are not actually their real selves when they are depressed so you musn't take it to heart.
It is a rocky and turbulent path. Maybe you should take your relationship down a notch and just provide her with friendship - don't let her be deserted, be a friend, she needs it now more than ever.
[SIGPIC][/SIGPIC]
Love is like a merry-go-round: you get all dizzy, and then you feel sick!