What should i get him?

My friend {who is a boy} got me a pretty dog tag 2 piece necklace for my birthday. on one dog tag it has a diamond heart{REAL!!} then on the second tag it is engraved hugs and kisses birthday wishes. now his bday is comin up and i dont know what 2 get him he has been throwin hints that he wants a chain. so what kind of i chain should i get and where can i find the store. pictures wood be nice too.