Are you in a committed, long-term relationship?
yes, i'm in two actually. one for 6 years, the other for a year. we make life decisions together and are in the process of moving in together. if we could, we'd be married

we've had non-legally-binding commitments to one another but even that is technically illegal, especially if you're living together.
Do you identify as heterosexual, homosexual, bisexual, queer, or other?
queer
Are you 18-29, 30-49, or aged like a nice wine?
18-29 (i'm 24)
Do you identify as male, female, butch, femme, transgendered, or other?
femme
If your spouse/partner would be supportive and accepting of the idea, would you (do you) explore open relationships/sex outside your primary relationship?
If so, why? If not, why not?
they are and i do

right now i'm not necessarily seeking out other sexual partners (i wasn't actually when i met my second long-term partner either, although i'd been in other relationships before that) but i don't discount new possibilities, either. both of my partners are monogamous but they're very accepting of each other and of the fact that i am polyamorous. if they wanted to seek other relationships i'd be happy for them. i know a lot of people have "primary" and "secondary" relationships but that configuration has never worked for me - no one relationship is more important than any other, although there has to be a certain level of long-term commitment to make life decisions or move in with someone. but neither of my partners is "primary."