Maybe he shows up at your work with a couple celebration cupcakes over a promotion.
Yes, some men are intimidated by beautiful women. Understand, men DO value intelligence, but they also want from their girlfriend what they CAN’T get from their business associates. They don’t talk much about it either, treating the experience as a shameful secret and burying it deep in their past. Maybe he thinks some other guy you're close to would be a better fit. Ironically, close moments with a partner can activate memories of painful childhood experiences, fears of abandonment and feelings of loneliness from the past.