The butterfly is a symbolism of chaos in your waking life. Perhaps the dream suggests to be more stable, otherwise the consequences wont be very favorable. The butterfly that is big could also foreshadow the fact that you will be seen by others a lot, because of your behavior and its not bad if you like the attention. See the explanation of flying to get more detailed dream interpretation.
Butterfly dream meaning
Read more about dreaming of Butterfly in other dream meanings interpretations.