My Coworker

I'm a 43 years old male, and my partner is a 40 years old female.

We've known each other since highschool, and date since 13 years approximately.

Lately, things are not going so well as they used to do. We bicker and argue a lot, and there's almost no sex life between us. We are both responsible for this situation.

I still love her, but I have a hard time seeing me with her for years anymore. I don't plan on leaving her, in part because as I said I still love her and don't want to hurt, in part because when we don't fight we have fantastic time together, and in part because we just moved in our new home and we would both find ourselves in a dire situation if we broke up.

At work, there is this woman, a bit older than me. She's really cute and funny, and she's hitting on me hard. I've always been the kind of guy ladies love to have around, but I've never been hit on much, and absolutely never this clearly.

At first it scared me because I'm technically her boss (higher rank but the same departement), but after a while I saw that she was flirty with everyone so I eased up.

Then it turned to the heavy flirting, as far as I can tell only with me. She tells me she wants me to go home with her, or that she can't live without seeing me, stuff like that. She always laughs after saying this, but even a dumb*ss like me finally understood that she was flirting. Once she was speaking with one of her colleague, and she said that I was really hard to seduce. She said this while I was in the office, glancing at me. Another time, I greeted by saying "Hello granny" since her oldest son just became a father, and she answered with "hello grandpa" while smiling.

Now when we kiss on the cheek for greeting each mornin (as we do here in France), our lips almost connect, her hand is on my back and mine on her gently stroking her. Sometimes our hands touch each other and we hold for a moment. On our last day of work, she said she wanted to rest her head on my shoulder a bit while we walked (which made us walk a bit awkwardly). I almost kissed her on the forehead, and told her that it was not good since I'm in couple and she knows it. She answered that we were not doing anything wrong, and then someone came in so we had to part. We kissed on the cheek again to say goodbye, lips almost touching again, and left.

Now I'm lost. I do not know what to do next time I see her, and what to do after this. I do not want to leave my wife, even for her, but I really feel lonely and this attention is really good to feel. I could definitely enjoy a side affair as I have almost no sex life, but I don't want to hurt my wife if she finds out. I'm scared that this could have a negative impact at work, but the thought of having this kind of relation is exciting. I feel my resolve and ethics eroding each time I see her.

Any advice would be greatly appreciated.