LadyD:
I'm not sure that your rejection is personal. I have a few theories:

THEORY A: a single female is going to feel pretty darn vulnerable in a relationship with a married couple. She could be pulling out before SHE gets too attached, because you and your husband are committed to each other, but nobody is going to make a committment to her:

THEORY B: The people you are dating might be perfectly attracted to you, but after a couple of dates, might have decided that they are not attracted to your husband. A few dates seems like a reasonable timeframe to evaluate and decide not to date someone anymore. Since you and he are a package deal, the single woman HAS to break it off with both of you, do you understand?

THEORY C: Even if you were not a married couple or dealing with a bisexual situation, you could run into the same thing. People often decide after 2-3 dates that a relationship just isn't going to happen. It's normal. Perhaps you're getting too attached too quickly?

Love, LMo