Most Helpful Girl
Tell her that you're there for her when she needs somebody to talk to. Let her have her space, she'll eventually realize that she wants you around-if she wasn't using what she said as an excuse bc she wasn't interested anymore.
Most Helpful Guy
You really can't bring her back, because that's a decision she has to make on her own. But you can try talking to her and comfort her. That may help her to make up her mind. There is also a very small chance that she has found someone else and is letting you go gently because she doesn't want to hurt you. This is a very remote possibility, but you can't entirely rule it out.