What is she trying to prove

I want to know if I am overreacting. My boyfriend and I were at a wedding and I got up to get something. While I was away from the table he was talking to a woman that we both know through other friends. I didn't think much about it. However, the next day, he tells me about the conversation. She tells him that she is envious of his and my relationship and wishes she had the kind of relationship that he and I have. He took it as a compliment about our relationship and was happy to share it with me. I did not take it that way. I think she was sending a signal and I don't think it's a cooincidence that she told him that and not me. Why did she wait until I got up from the table to say that?? Just curious what others think...............