Oof. The "two interesting people at once" problem.

What I did, back in the olden days, was talk about the other person.

So you are dating Person A and Person B.

When on a date with Person A, in the course of conversation you can say something like, "Oh hey, I was on a date the other day, and we were talking about the same thing! I was thinking X, but they thought Y. And you know what, you bring up a really good point! If I see Person B again, I'll have to mention your idea to her."

Bam. You are dating other people. You are open about it. Your life is surrounded by interesting people who you enjoy talking to.

And here's the test: how does your date react to this?

If they are defensive and upset you are talking about someone else, run away! Nothing good down that road.

If they are curious and ask questions, or even if they just let the comment roll away unremarked-upon, then you have a KEEPER. This is someone who isn't going to be petty, jealous, or constricting. This is someone who is interested in you, your brain, your thoughts, and your life.

That's the person you keep dating, because that's the person you can create a collaborative and engaged life with.