Boys don't really care about gifts when they have birthdays. They don't like surprises like girls do. As long as they are happy together, that's enough. So as a girlfriend, you can have a good birthday with him. As for birthday gifts, you can choose a simple gift. Here are some suggestions:
1. You can choose a small gift according to his hobbies. If he likes sports, you can give him a related gift. For example, if he likes gifts around star players, they are all very good birthday gifts.
2. You can choose some common gifts, such as wallets and watches. For boys, they will be very happy to carry things given by their girlfriends.
3. You can also give him a box of DIY chocolates and make what you want to say. He will be very touched. As long as it is your intention, he will be very happy with any gift I want to give.