Ketu brings detachment and inward spiritual focus into a house otherwise associated with romance and creative expression, which can add emotional distance or a philosophical attitude toward relationships. This doesn't erase the capacity for love — if Ketu's dispositor is well-placed (especially in the 9th house), or if there's a favorable exchange with the 5th lord, or if Jupiter casts a benefic influence, the result tends to be a love life with more spiritual depth rather than one that's simply lacking.