How do I become a better listener when it comes to my boyfriend?

It’s usually the girl that bitches that her significant other’s not listening to her. But my boyfriend is a great listener and remembers little things that I’ve done or said. I feel horrible that I can’t do the same it goes in one ear and out the other I guess. I noticed that today when I went to get him a birthday gift and couldn’t think back through all the time we spent together and take something from that to pick a gift I could remember some stuff we talked about but nothing substantial. Any tips on how to get better at really listening and remembering? I feel like a horrible girlfriend that Im having trouble with this.