Liking, sharing comments not post – issues and workarounds?

I am trying to implement liking/ sharing comments. Please visit any post on this site:
https://www.khojiye.com/reviews/ eg.
https://www.khojiye.com/reviews/institute/sigma-classes-for-iit-jee-kanpur/

My issues:
Is it a good thing to do as I believe its slowing up the page load? Any suggestions?
When i use facebook open-graph to check for comment specific link it just shows the main page link eg.
https://graph.facebook.com/?ids=https://www.khojiye.com/reviews/institute/sigma-classes-for-iit-jee-kanpur/#div-comment-388 result in

{
   "https://www.khojiye.com/reviews/institute/sigma-classes-for-iit-jee-kanpur/": {
      "id": "https://www.khojiye.com/reviews/institute/sigma-classes-for-iit-jee-kanpur/",
      "shares": 1
   }
}

ANy idea why indivdual link stats are not shown. [I believe like is only happening for the comment and not the whole page]
3. Google+1 and share: Though I have used the comment link href of +1 code it still seems to +1 the whole page ignoring the fact that it is for comment. Is it to do something with google do not consider # or anchor links as new page?
ANywork around? I am not using any plugin as they tend to just like ,share the main page/ post and not the comment.
Thanks