<human>: Can you succinctly summarize the text in 1-3 sentences?

I've been dating a lovely woman for a little less than three months now. She's new to the city and doesn't know many other people. As a result, she has complained about loneliness from time to time, and a desire to expand her social circle. Also, from the very beginning of our relationship, she has expressed a desire to see me more often. We began with two dates a week, and are currently seeing each other at least three times a week.

Apart from these very subtle hints of loneliness and an apparent craving for affection (which I found endearing), she seemed happy, and almost carefree. However, last night, she told me that, although it may not be obvious, she suffers from depression, and has been on antidepressants for a while. She also stated that she had tried to take a break from the antidepressants, but she quickly dived back into depression. She fears that, in the absence of medication, she may lose control and harm herself. As one might imagine, this was a lot to take in. I can't help but feel like an idiot for not picking up on any signs. 

My question is, what do I do with this knowledge? We've talked about it at length last night, but I just feel lost and incapable of providing her with the help she deserves. I'm also clueless about the effects of antidepressants, and am worried about her inability to envision a life without them. Please excuse my ignorance. I guess I just need some advice from those who have been in a similar scenario.
<bot>: A woman I've been dating for nearly three months is suffering from depression, and I feel lost. I was unable to detect any trace of depression, other than a few comments hinting at her loneliness.