It's your ex-boyfriend's birthday, and he has a new girlfriend now. You can give him a gift, because after all, you have experienced so many things together. Even if you can't be lovers, you can still be friends. So you should give him a gift to express your blessings to him.
You can ask him and his current girlfriend what their zodiac signs are, and then order a zodiac necklace for them online. It is very popular, generous, and not expensive. Otherwise, you can give them a pair of couple dolls, which is also a good choice.
You can also give him something that his girlfriend can use. In fact, giving it to his girlfriend is equivalent to giving it to him indirectly, and the most important thing is that it will not cause misunderstandings from his current girlfriend, because the boyfriend's ex-girlfriend is a very sensitive word to her. Don't create unnecessary misunderstandings. Haha, in short, there are a lot of creative gifts on the Internet now, everything you need, it depends on what your ex-boyfriend likes, there are a lot.