butterfly
She was a social butterfly who attended all the best parties in town.
I just don't have the time to be a social butterfly.
They saw her as nothing more than a social butterfly who lived for pleasure.
I found him laughing with a group of friends, always the social butterfly.

SMART Vocabulary: related words and phrases

Changing frequently
capricious
capriciously
capriciousness
changeable
changeful
inconsistency
inconsistent
inconsistently
inconstant
inconstantly
patchiness
patchy
ping-pong
protean
raggedly
unpredictable
variability
volatility
yo-yoing
zigzag