I've identified as solo-poly, RA for at least 3 years or whenever I learned the terminology for it, and have been practicing it more or less for a decade or longer. Many FWB and "casual but consistent" partners.

Long journey short, I met someone recently who I've found I cannot help but want to prioritize and it's tripping me out (in the best way) because my long-held identity is now being rattled.

Has anyone here transitioned out of Solo-Poly and/or RA into a hierarchical relationship? How did that go? What did you learn? How did you tell all those (romantic) people who you once told "I'm never going to be in a relationship, I'm just not built that way."