Please, I need help

You are the one should know your boyfriend more than anyone, so you should know what he needs. If he has everything, then you still can buy him a T-shirt; pen; belt; a pair of shoes or mobile and so on. Besides you can reserve a secret candle lit dinner for both of you. I believe your boyfriend will like the gift as long as you bought it.

give him a wrist watch this will makes him happy or a cap.

Wishing him a happy birthday with a sweet kiss, you can present him with a gift which is long lasting like a diamond ring or gold chain if money permits.

When I need do a specially gift to a specially person always I try remember what he wanted.I mean many times we can like something but we can't be sure if he gonna like too.Of course any gift from heart is specially but if you just try to find what really he likes it will be even more special by the thought that you choose knowing him well.

anything will mean something if you give it from your heart

Maybe you should cook special food for him, just make sure it's really yummy so he won't break you up....lol