Bff advice

So me and my best friend are both 20 and have been friends forever. But she is single and desperately wants a boyfriend. I have a boyfriend and have been with him for 2 and a half years. So 2 weeks ago we went to the beach and we were both walking around in our bikini tops and shorts. She was checking out guys and then got pissed cause apparently they were looking at me not her. She got to the point where she had a go at me and said I was getting to much attention and she wants to go home. So I drove her home and she didn't talk to me the whole way home. She hasn't messaged me since. I feel so bad but I don't understand what I have done. Any advice???