I've got myself into the middle of a sticky situation and I feel awful about it. What should I do?

I was talking to a aquantaince named Becky the other night at the bar. We mainly were discussing concerts we'd been to when she brought up a friend of mines personal life. This friend she was referring to is Tamara. Tamara recently got back with her boyfriend and Becky was discussing it with me telling me she didn't like Tamara and that she didn't think Tamara was right for her bf. I then went back to Tamara whom I was at the bar with. Tamara had noticed us chatting and know we'd said her name, so she insisted on knowing what was said. Trying to stay out of it all I said was that we'd discussed her getting back with her bf. Then her bf came and sat down and told Tamara that Becky had confronted him about their relationship also. This ticked off Tamara and she confronted Becky in a not so nice of a way. Of course dropping my name several times instead of her bf's. Now I look like a tattle tell and feel badly for Becky. I don't know Becky well enuf to call her and explain it.