He is supposed to be leaving for San Francisco for a new job, but the woman he had been seeing had recently returned to Chicago so at the last minute, he changes his mind and follows heart rather than head and all that - that's the kind of final denouement/happy ending bit when you find out he has flown to Chicago rather than San Francisco.
ah - I don't think she was mentioned in the last episode so it didn't click with me.
Which girlfriend was it? The one who started the dating agency and had a real eco boyfriend?