Huh, it's all so open, eh? I mean, I just defined primary as how much I'll change my life around to be with someone, but that doesn't include LDR, because if it's long-distance, then one of the things the two people aren't changing is their location. Rearraging schedules to talk to each other on the phone is a way to accommodate each other so...
So good that you feel good about the way things are with him, ie: him being your primary, while dating freely and knowing you're not "his".
I'm not sure I understand how feeling monogacentric relates to loving someone but not being in love?
My heart is too big to fit into one person.