Polyamory, sometimes called non-monogamy or open relationships, is a big subject with a lot to talk about, so we'll start at the beginning: with a definition.
You’ll see it defined a lot of ways, but here’s one we like:
Being interested in or pursuing intimate relationships (emotional and/or sexual) with more than one person at the same time, in a consensual, open, informed setting.
Have you ever been super into two people at once, and told you need to pick one? Well, if and when you don't want to, maybe you don't.