Give boyf a nice birthday? Watch
Make it seem like you don't remember it's his bday and then give him what most guys want on special occasions: sex.
Favourite food. etc.
When I had no money I spent AGES making a huge birthday box and put a helium balloon inside it and engineered it so that when the box was opened theballoon rose out and the box sang happy birthday.
Just make him feel special and like the birthday boy