You could use "person-centered" listening.

In this approach, the listeners goal is to understand what the other person is saying but not to judge or offer advice. The way one does this is by paraphrasing what the other person is saying and using empathy to understand their underlying emotions. Saying these out loud allows the person to know that they are understood and accepted, not judged.
The thinking is that acceptance of what they are saying allows them to explore further and come to their own solutions.

So for example if she says "I feel like I messed up X and i don't know what to do now. What should I do?", a person-centered reply would be something like "It sounds like you are feeling really anxious and perhaps guilty about X right now, and you are unsure how to handle the situation."

She might say "Well, yes, anxious but not guilty."

To which you could reply "Okay, right, not guilty at all, but quite anxious."

And if she insists on getting advice from you, by saying "But what shall I do?" the person-centered listener replies with something like "You really wish that I could offer the solution to you."

That is a brief idea of the general idea. This approach is a known listening/counseling technique; some therapists use it as their primary technique in therapy. Pretty much all others use it as one tool among many. Showing understanding and acceptance of what the other person said is a main foundation of helpful listening and counseling.