sentimental boy is my nom de plume.

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wall•flow•er 
/'wôl.flou(e)r/
noun; wallflower; plural noun; wallflowers
  1. a southern european plant of the cabbage family, with fragrant yellow, orange-red, dark red, or brown flowers, cultivated for its early spring blooming. 
  2. [informal] 
a person who has no one to dance with or who feels shy, awkward, or excluded at a party.