Relationship advice!!

Alright so I need opinions there is the guy that a met a couple years ago and I met him by a friend of mine. We started talking and went on a date and man i never had so much fun. Ever since that day he has made me laugh and smile... unfortunately there is a ‘but’ it’s something that kinda bugs me he is kinda my height maybe like a inch smaller than me but ughhh it bugs but at the same time I don’t think I have ever met a better guy... he just turned eighteen and so did I. I know I’m young but i don’t know if there will be a chance he can grow( i apologize if that sounds mean) what should I do? Should this bug me? Give me advice opinions please!