Dear Queenie,
I recently met a very nice man who seems interested in me and has asked me to go out with him. He is not married, but my sister says he is living with a girlfriend.
I can’t make up my mind whether to go out with him or not. It’s not as if he was married, but I don’t like having to compete with another girlfriend.
What do you think, Queenie?—Undecided
Dear Undecided,
I think your competition has the edge. If this man is living with her, presumably there is an established relationship between them and some degree of commitment.
I also think this man has demonstrated that you cannot rely on him to be faithful to you if you get involved with him. He is cheating on the woman with whom he is living and no doubt he would cheat on you as well.
I am sure you can do better.