I wasn't polygamous, I was polysexual and identified as bisexual and poly for a good chunk of my adult life. Polyamory and polygamy are two different things. But I was poly and realized I wasn't. But I spent my entire university era with multiple partners. I wouldn't say i'm closed off to it again, but I think i'm definitely monogamous. Having multiple partners is exhausting, and I don't have time for one partner, let alone multiple. But eh, maybe I just haven't met the right situation yet.