Err... i need some advice about my boyfriend. thanks.?

So today is me and my boyfriends 1 year anniversary (its my first time being in a relationship for a year) He is 27 an im almost 19. (obviously, he's been in many relationships, that have lasted longer than 1 year.) were pretty short on cash right now, and i'd like to do something special for him that isnt too expensive. what should i do?