How to implement responsive social sharing button with counters?
Try any one of this following

1) Social Share Counter


  This module is clearly inspired by the share buttons used by Mashable.
  
  This module gives the share counts for only Facebook,Twitter and more
  which has some excellent features in more elegant manner. If you have
  a website, then you definitely need this module.


2) Social Share statistics


  This module is developed to track the share statistics of social media
  clicks. So when a registered drupal user shares any content to social
  media, this module saves the uid, nid and the share count for
  FB/twitter/GPlus in the database for the record.
  
  There is a 'Shares' tab on the user profile page where the user can
  get the list of content shared on different social networks (facebook,
  twitter).
  
  This module only tracks shares that are made using the share buttons
  that the module provides. If you share the nodes with some other
  mechanism (say directly copy paste the link to Facebook, Twitter, etc.
  or use some other module), those actions / shares do not count.