last summer would be perfect, maybe they bumped into each other or matched on tinder or something like that soon after robb moved to town and things kind of went from there? he's kind of conditioned to enjoy conflict so he would have absolutely gotten bored with jareth being super patient pretty quickly, so it was probably 2-3 weeks at the very most, but he's super honest at the end when it comes time to bail so he wouldn't have tried to make excuses or anything!