This is a good question.
About this time last year the girl I was seeing started connecting with another man. It was a strange and confusing situation. I met her in London whilst she was travelling, and as she continued to travel I'd go out and meet her on occasion. Anyway, we were in Turkey September last year, and towards the end of my trip we told each other that we loved each other. Then I had to return to London. Three weeks later I went to see her in Greece, and discovered that she was talking on the phone to another man she'd met whilst I was in London.
Now, I knew this was a game. I knew she wanted to make me jealous. She told me that she likes to drive men crazy so she can find out how much they like her. The problem is that I simply refused to take the bait. I have meditated for 15 years and worked incredibly hard to gain self control and to not allow my peace to be disturbed. So she continued to connect with this man, and I refused to take the bait. Of course I tried to talk to her and understand (she is a damaged girl), but the more I refused to be driven crazy then the harder she tried to drive me crazy. The result being that one day she messaged me to tell me it was over because she had a new man.
Again, refusing to take the bait, I simply wished her well, told her I hoped he could make her happy, and went on my way. About a month later she contacted me to apologise. I gracefully accepted the apology, told her not to worry about it, and continued on my way. I know that her feelings for me were genuine, and I knew the games she was playing and why, but I just could not accept that kind of behaviour in my life. I set clear boundaries with her, I told her what would happen if she continued to violate them. I made every effort to understand her and try and work through the problems, but I couldn't give her the crazy reaction that she obviously felt she needed to know how I felt.
I am very traditional in relationships. I've never cheated, and never even come close to or been tempted to. I put huge value on trust and mutual respect. I liked this girl. There was much about her that I enjoyed. I know that I hurt her deeply by walking away, but I don't think there was anything else that I could do. I really hope that it has made her think, maybe do some healing, and that the lessons she has learned from this will mean she can be happy in the future. As a compulsive grower and someone who sincerely wants to do good to others, the whole situation has been very challenging for me. It still haunts me a bit 10 months after it all ended.