Alright. Loved the game. Interpretation time.
The boy in this case felt like she wasnt paying attention to hm but he still loved her so very much, so he kept giving her all of these things, adding colors to the world around her. Giving her all of these gifts in hope that she would care. But in the end, all that was important was the white colorless bird. He had spent his life giving her all these things when she was perfectly content the way she was