Yes, according to Greek mythology, Apollo fell in love with a mortal man named Hyacinthus.
This love is a well-documented aspect of Apollo's mythology. The relationship between Apollo and Hyacinthus is characterized by deep affection, devotion, and companionship. The reference explicitly states that Apollo "fell head over heels" for Hyacinthus, demonstrating the intensity of his feelings.
The myth also highlights Apollo's dedication to Hyacinthus. He abandons his godly duties, such as tending to his shrine at Delphi and engaging with his usual responsibilities like playing the lyre and using his bow, to spend all his time with Hyacinthus. This sacrifice underscores the significance of Hyacinthus in Apollo's life and the extent of his love. The tragic end of their relationship, where Hyacinthus is accidentally killed by a discus thrown by Apollo, further emphasizes the depth of Apollo's feelings, as he mourns Hyacinthus deeply and transforms his blood into the hyacinth flower as a memorial.