Sorry you're hurting, but I disagree with her being a heartless *****. I think this is a difficult situation for both of you. She wants to keep her job and do her work but still maintain the boundaries that she set for herself by breaking up with you--she set them pretty clearly by doing that. When you bring her flowers at work, how is she supposed to react? If she acts all excited about them, then she is stepping over her own boundaries that she set up just to make you happy and sorry, but I just don't think she's concerned about that right now. I think she's probably more concerned with how she's going to manage keeping a healthy distance between the two of you while also working with you. Which doesn't make her heartless, it makes her healthy.