did he really break up with you? I've seen on twitter that his ending is bugged because his romance flag isn't triggered.
No, he speaks to you romantically, but the options are basically you tell him his sweet sentences sound like a goodbye, or you try to convince him to stay with you and forget the world. Either way, he declines. He says your hearts are free to roam, and he hopes you will visit because he longs to see you. But it's always this noncommittal poly garbage they forcefed on us. His priority is the city refugees, not being a loving companion to you.
It's so aggravating. Meanwhile all the straight men and lesbians get committed, monogamous women who make plans to be with you in the post game, but they went and made a male companion a no strings attached free love Mother Teresa.