Was it said when uke fell in love ? I thought it was when seme took the picture during hig...

Was it said when uke fell in love ? I thought it was when seme took the picture during highschool but uke already loved him when the girlfriend confessed to him.

Also why did seme think uke stole the girlfriend ? Uke rejected her so he never dated her and im.guessing he didnt mess around with her, so how did seme came to the conclusion uke stole the girlfriend ?