Life is not "one size fits all". Live yours in whatever way brings you and your consenting partner joy.
If you're curious about other worldviews then do more research. I'm not sure what "studies" you are referring to but I doubt they prove one relationship arrangement is superior to another. Also, since you don't even remember what this guy told you about the awesome that is poly... it can't be that difficult to get over?
Me: male, 40, straight, single