The bee did not play with the little butterfly because it
The answer is: busy with it.
The bee did not play with the little butterfly, as she was behaving friendly and loving towards her. Although the butterfly wanted to play and have fun, the bee was avoiding playing in a way that would harm the little butterfly. Although the butterfly and the bee did not play together, they were still good friends and loved each other. Therefore, the bee did not play with the little butterfly, as she was aware that any unkind behavior might cause harm to her little friend.