If you love her, set her free

If you love her, set her free... so that she may find the love she desires.

These words from R ring in my head.

Everyone has his/her own image of how his/her love should look like.
C made a conscious decision to leave.

C didn't accept your love, so yours is not the type of love she desires... at least not fully then. Therefore, she has to break up with you to have the chance to find the kind of love she desires.

Maybe she has found it, maybe she hasn't, but this is not part of your story anymore; it's hers. And you are no longer a part of her story.

True love is wishing the best for her. If she has found her love, be happy for her, even if it's not you. Only she can decide what is right for her and what will make her happy.