well lets just say when i was 16 i was a skinny little kid still. i played baseball my whole life so i was always in shape but was never really a big power hitter, but as i grew i got a bit stronger and added distance to my baseball game. same goes for my golf game, and im sure as you get bigger and stronger you will add distance to all of your clubs. so layups may become less and less in your game.
BUT!!!! as long as you play to your skill/own game, keep at it man! personally i need to lay up more instead of going for everything and playing to the weakness of my game which is 60-70 yards from the green.
anyway im rambling you are young and the distance will come. trust me as long as you have the athletic ability you can perfect your game, but at the same time it sounds like you are doing the right thing already