>

U are just overthinking the concept of a relationship lol. There’s no rules or guidelines, it’s simply a thing people do to make themselves happy.
Who says the point of a relationship is to sacrifice a bit of ourselves for someone else? While any long term committed relationship likely involves some sacrifices to assert that is point as fact is misguided and narrow-minded. 
But you do you, if that is the point of your relationship then have at it! None of my business just as other people's relationships are none of yours. >

Nah, im not poly but I can see having feelings for multiple people and both people acknowledge that and are okay with them continuing to see that person. Im way too fucking insecure for that but certain people arent. OP Im sorry for whoever hit you with the “Im poly” i can tell this post was made angrily >

I really don’t think not wanting your partner to see other people while dating you is “insecurity” >

“Anything I don’t understand personally means you’re narcissistic” 
Can we please stop taking away from the meaning of that word and cheapening it by saying dumb shit like this? >

God, I'm so sick of the overuse of the word 'narcissism'. I doubt you mean that poly folks have Narcissism personality disorder or that they are more loosely just obsessed with themselves. Feels like you're just grabbing a word you feel means "bad person" and using Narc in its place.
Also, your opinion is wrong, I've met some very loving, caring poly folks
​
Edit: Grammar >

I try not to stick my opinion into other people's relationships, but I have a hard time disagreeing with this. I've just seen far too many couples with abusive dynamics to believe that every time someone says they're polygamous, it's a completely consensual and healthy thing. Plenty of men and women out there are being taken advantage of without putting any kind of label on it.
I just hope that everyone out there in an "open relationship" is as okay with it in their heart as they say they are on social media. For their sake. >

I'm not well versed in Polyamory in real life, but what I have seen online the typical relationship appears to be a woman who is a 3 being in relationships with a bunch of guys who are 1s and 2s. To me it seems like people making the best of their bad situation; a woman who can not attract a good man is creating one in aggregate, and men who have no chance of attracting any women by themselves choose to share. 
For anyone wondering what I mean, there was a story promoted by progressive media outlets of a pregnant woman with 4 boyfriends that lived together in a house. Less than a year afterwards, the baby was injured by one of the non-biological fathers. Most of what I have seen on Polyamory seems to follow a very similar archetype. 
"Ethical Non-Monogamy" is just people lying to each-other and pretending to be in a relationship.