I mean...the deal was seeing him again, not being with him. You had your chance, this is an alternate reality where MMC finds a girl that doesn't beat around the bush. Sucks to suck
I'm thinking (before reading chapters after this one) that the Goddess granted a wish that Nogata didn't die, and since he didn't she never made the choice or chose poorly. Time moved ahead until she has to move and he's dating someone else. I guess I'll see shortly as I'm binging this to the end since there are only j19 chapters.