Please give me your best advice on how I should handle this situation.....

I am a lady who became involved in a very odd situation several months ago. This situation pretty much resulted in a triangle with a man to whom I was very attracted and another lady, who had been a fly in the ointment. The man seemed to enjoy flirting with me in front of this lady and making her upset and doing the same thing with her in front of me. For my own emotional well being, I took the advice of people who told me that I had to step away from this and avoided being anywhere near these two people. I did just that (even spending some time in a distant vacation spot) and know that my health would have suffered if I had continued to put myself through this wringer. However, I will need to put myself in close proximity again in the near future to these persons. For all I know, I may not ever see one or both of them again. The chances are that I will see them again. In case I do, and this man says something to me like "How have you been" or something like that should I ignore him altogether or explain to him that I want no part of him and any triangle involving this lady friend of his? Just the thought of this repeating itself again makes me sick. However, I just don't feel that the problem is solved. There is a saying about not solving problems by running away from them. What do you think about how I should handle this? I greatly appreciate your honest comments.