Few days ago she was sad about something and she didn’t tell me what happened. I asked her hat do you want the most now, she told me that she wants to die. Then I said everything will be ok, she said"no it will not. Bye". Next morning I messaged her, but she didn’t answer and blocked me everywhere where I texted: on phone, facebook, skype, snapchat.
Can you advise me?
Let her sort out her issues by herself. You don’t owe her anything.
If she blocked you everywhere assume she doesn’t want hear from you.
Is there a back story or is this just the start of it all?
Honestly it feels like she is attention seeking a little bit, she can’t say those things then go off and block you. Just give her space, that’s all you can do right now!
You might be interested in reading these articles.
https://exbackpermanently.com/get-ex-girlfriend-back-if-she-has-new-boyfriend/
https://exbackpermanently.com/get-your-ex-back-when-he-wont-talk-to-you/