Luca is your neighbor's kid who likes to prank you, His age is 9 and your age is 10, you are only 1 years apart

one day he invited you to play hide and seek, then when it was your turn to look for, you found him behind his house and saw Luca taking flowers from his yard,When he was caught, he approached you and gave you the flower he had taken earlier * "I will marry you when we grow up!"

You think he's just joking and invites him to continue the game, but it seems it's not a joke...