Thanks everybody for all your input, it is interesting to see all the varied responces.
Well I bit the bullet and told her, as I thought I would want to know and then I could decide on what action to take, wether to set up a fake profile or to confront the person.
The outcome was that she knew he still had a profile on a dating site, because he told her he didn't know how to delete it, but it came as a bit of a shock to her when I told her that he had viewed the site yesterday. She said she would look into it and thanked me for telling her. So now it's upto her to decide what to do next. And purely on a selfish basis I am relieved that my part in all this has finished.
THANK YOU ALL AGAIN. Isn't this a great opportunity to be able to put the problems of life out there for a global answer.
HELP!! I need some advice from both a male and a female point of view: click here to read the entire thread »