Opinions on Polyamory?

No, a harem is where 1 guy or girl has many partners all to themselves. A true poly/open relationship allows any guys and girls involved to have any partners they see fit. So you might have 5 guys and 4 girls, or 5 girls and 3 guys, or just 2 and 2, all in a relationship amongst each other, and in some cases establishing a household together. Its very different from what you typically see out of some cults and certain religions (which is usually whats more in the public eye).

Sounds complicated. Like some reality tv show kinda complicated.

It's really a subjective thing, all I know is it isn't for me, I had a girlfriend back in high school who clearly wanted to be polyamorous and the relationship fell apart quickly because of a combo of her not willing to understand how I felt about that as well as her continuously flirting with her friends after I had told her that I didn't like her doing that as to me it felt like cheating. I find it kind of ironic that it was like that at the time, as just a few years before and somewhere between the end of elementary school and the start of middle school, I was pretty much doing the same thing as her but keeping it secret, but it was long enough afterwards that I had gotten my karma for it and started sticking to monoamory.

Oh trust me man, if it were only like that, karma wouldn't have crashed on me so hard, only reason I've been getting that off my chest is because I'm hoping that karma will spare me for once if I stop trying to hide that I went through that phase.

Well man you're only 19 and I am 28. If I can survive living in the same crazy world I have faith you will come out on top in the end. Love and Peace as Vash from Trigun would say.