Most Helpful Girl
I've never dated interracially, but I'll still add my 2 cents.
I feel like he shouldn't have lived with you if he felt that way, but he may have still not thought you were "serious" even though most people would take living together as "serious".
I would just offer the advise to discuss this type stuff early on if you plan on dating interracially in the future where marriage is desired or possible.
Obviously you guys just want different things & that's OK. Hopefully you will both find the right fit for yourselves--hopefully without the misunderstandings or misleading as with your past.