What you do is live your life. You apologized and now the ball is in her court.
Despite what gucci says, your A could have played a role in what's going on here especially if you hadn't dealt with your issues. For example, if you felt she didn't deserve to be respected which is why you had the A, then you might have treated her badly without actually realizing it. Again, it's just a scenario.
Especially since you didn't talk to her about it, I think sweeping it under the rug was a bad idea.
So she's going into depression. That's actually good. It means that she's torn and that she hasn't made a decision yet. Keep the positives going and get her to trust in you again. Not because of your A, but to get her to open up to you once more.
M-43 W-40 2D - 9 and 5
Emotion, yet peace. Ignorance, yet knowledge. Passion, yet serenity. Chaos, yet harmony. Death, yet a new life.