Most Helpful Girl
He is 'Under18' much like yourself here, dear, and perhaps More Wet behind the ears in Years as well. He is also at the age and in the stage, as many boys his age Are... Told a girl that she was beautiful. He may have wandering eyes to your surprise.
He did Choose you as his Steady Betty and if you have not had a problem with him up to this problem point, such as Other 'Stale' and 'Fail' things at hand, then make sure you tell him if he ends up Ever having eyes for Not You Only, he will end Up... Lonely.
Good luck. xx0