Hello Saloh52: Welcome to PsychCentral! From what you wrote, it sounds to me as though your friend may be struggling with Post Traumatic Stress Disorder (PTSD). Depression would certainly be a part of this. There is a PTSD forum here on PsychCentral. You may want to spend some time reading posts in that forum to get a better idea of what it is about:

Post-traumatic Stress - Forums at Psych Central

Given that you are in Norway, & your friend is apparently in India, there's probably not much you can do at this point other than to try to keep in touch via the internet to the extent possible. Just periodically send her messages of concern & support. Try not to be "pushy". You don't want to make her feel overwhelmed. But just continue to let her know that you care about her & that you're available to correspond whenever she wishes to do so.

As far as your question regarding can she recover without treatment, this is difficult to say. It is certainly possible. But it is also possible that she may just continue to struggle & possibly slide even deeper into depression. There are allot of variables to consider here.

As far as clear signs of suicide go, there again, given your geographic distance from her, I don't know that there are many signs you could pick up on. But it is true that it is okay to ask... straight out... are you thinking about killing yourself? Experts in the field of suicide-prevention say that asking the question will not put the idea into a person's mind. It's already there. And asking the question may just be the thing that will get the person to admit they are thinking about it. Then help can be provided. Beyond that if you know anyone else who is where she is physically, you could also relay your concerns to them & see if they can check on her & possibly help her to get whatever treatment she needs. This is a difficult situation. I wish you all the best in your efforts...