His goal is to keep her happy. She wants to date him. He refuses. What? Boy, you have to commit. If she tells you to lick her toes, if that's what it takes to save the world, you need to do it.
If the actress is underage, seeing how nice all the staff and and the author are, I feel like they'll take it into consideration and tone the scene down. Especially something like kissing. i've seen dramas where they have an angle that shows the actors heads getting close but doesn't actually...