Is it possible to be neither, or both, polyamorous and monogamous?

How do I identify if I'm comfortable with the idea of both polygamous and monogamous relationships?? I'm either monogamous or polygamous right? I can't be completely happy in both type of relationships?

First off, the correct term is "polyamorous," not "polygamous."

Second, it is entirely possible to be a person who would be happy and fulfilled in a polyamorous or monogamous relationship. Just like there are people who would be equally happy staying at home with kids or working in a career. People who would be equally happy in a relationship with a man or a woman. Very few things in this world are true, all-or-nothing, either-or binaries.

As for an identity term that captures this, there isn't one that is widely used for this, the way we have "pansexual" and "bisexual" or "bigender" and "genderfluid." But some that are out there include:

  • monopoly or polymono
  • polyamorish or monogamish
  • polyflexible or monoflexible
  • biamorous
  • flexiamorous

But, above all, relax! You are who you are, and it's pretty neat that you have available to you a wide range of relationships and partners. Seek partners based off mutual connection, be clear about what you expect of your partners and what expectations of theirs you can and can't meet, and you're golden! 

How do I self-describe if I could see myself in a polyamorous or a monogamous relationship?

i haven't been in a relationship yet, and i'm open to the idea of having 2 or 3 girlfriends, but i wouldn't mind having just one. would the correct term for people like me be "open to polyamory", or just plain polyamorous?

Whatever term helps you self-identify in a way that's healthy and gives you the tools and language to find the relationships that work for you. Some people use terms like "polyflexible" or "mono-poly" to describe themselves as someone able to have healthy, fulfilling relationships that are polyamorous or monogamous.