you could get 730 jelly kisses/lips and tell him its a kiss for everyday you have made me complete :)
if ur 13 this means u started dating after kindergarden
a big kiss
Give him all your love ,in return you'll get all of his x
bake him some cookies.
Go 2 more ba<x>ses from where you currently are. If you're on 1st go to 3rd. Etc
depends on his taste...search the web for cheap thoughtful gifts
for that amount a shirt/hat