She's talking to herself. She's clearly upset or disappointed or heartbroken. "With two seaming bodies but one heart." That was a great line. This demonstrates how much she is really caring about this person she's talking about, in that she feels like they are the same person. Most people usually describe there lovers as someone who they are one with, or a best friend. In this case, I didn't understand which she was referring to. But something happened that didn't come across as lovely or friendly.