What can I do to make this girl love me?

Me & this girl have been in a relationship for about a month now and I've done nearly everything to show here that she should love me. First of all, I seduced her knowing she was in a relationship with another man. Since then she has slept with an ex-boyfriend and her real boyfriend while sleeping with me on the side. Each of us knows this because she does have the courage to be honest.The problem is that she is inclined to be impulsive and usually regrets the decisions she makes but I'm doing my best to be with her and have bought her a dozen roses and I just bought a Bath & Body Works gift basket for her . I know she sounds like a tramp but I love her, what can I do to capture her attention?