Facebook comments on a site made using Google new Sites.

I have a website that I made using New Google Sites, and I would love to ask for 2 things please 1- How can I add facebook comments to this site?!

2- I succeeded to add facebook Like & Share buttons but it shows me that some people visited my page and liked it and I do not know how to know who liked my page. Can you please help me with that too?! Thanks a lot

Asked about 2 months ago