MSN.com, Match.com, HappenMagazine.com: they’re in a healthy and satisfying 3-way relationship. Meaning that you can find MSN/Match.com’s “Ask Lynn” columns –penned by BG’s alter ego — over at Happen now as well.

This week Lynn hears from a gal who’s scared-to-lose him, but she’s was burned by a cheater before:

I got out of an extremely bad relationship about three months ago with a man who cheated on me. I thought that I was going to stay single for a long time because I knew that I would have a hard time trusting again, yet that’s not how things worked out. I became friends with someone shortly after the break-up, and the more time we spent together, the more we both realized that we were meant to be together.

Now she’s grown suspicious of this new love and it’s driving him away. Is she unable to let the past go and what should she do? Read the full letter and response at Happen, then chime in with your own thoughts below.