What should i get my boyfriend for his birthday?

he's going to be 17 on july 17th. i just turned 15 and we've been dating since may 14. he got me a gold heart necklace and flowers for my birthday. i have no idea what to get him for his! he said he wants something that reminds him of me. i also hear him talking about him needing a new belt. i think i'll get him a belt but i want to get him more. please help. he loves music like rock and older bands. but i don't want to spend too much money. just please give me some cute ideas :) thanks!