How to add link to your comment
If you really want to add a back link to your comment,there is a really an easy trick. If you first have to copy the link and then paste the address, it's way too difficult, so better use this very simple tips, but practical trick.

So only thing you require, is this simple code:

<a href="link">text to click on</a>

Here is an example, I  make a comment to this article and will add this link below there, so you see how it looks, click the link on my comment below and you should get back to this post automatically:

<a href="http://vrtricks.blogspot.com/2013/02/how-to-add-link-to-your-comment.html">how to add link</a>