I'm sorry to hear about your current situation. I have no doubt how hard this is on you to watch your loved one suffer.

You will not be able to "pull her out" of this episode.

And can I dispel the myth that "she doesn't want to get better". Nobody wants to feel depressed. It's awful. Unfortunately external circumstances may have very well caused this.

In order to move forward in this relationship you need to stop "stressing" about her moods. When you entered into this relationship you entered it knowing about her mental health. You would have known she would experience ups and downs.

Your stressing would reflect on her which could make her feel worse.

Give her positive affirmations without coming across as if it's being done out of desperation to make her well. This would only compel her symptoms.

She may not be up to doing much but if there are small things she can manage, even if it means just going out for a cup of coffee with her then do it.

Don't question her on whether she wants out of the relationship. She's already communicated to you that she wants to be with you. Don't add this as an extra burden.

I'm sorry that this comes across as a "don't do list" but my comments are personal thoughts only, after having taken into account the comments made in your post.

I think this could work out for the two of you. Give her time to heal whilst still being there for her.

Be well.