I m 27 & have been single & lonely for entire life. Never had girlfriends neither do I know how to get one. I have been a subject of fun for all my friends due to this matter. I m good looking & smart too. I have tried sns too but its of no use, I dont know how to talk to girls its really saddening for me what to do ?

Well then, just be yourself and try to make 'friends only', this will ease your nerves and pretty soon you will be getting the hang of it. Make it an exercise, try to talk to one new girl a day or a week, no matter who the girl is or what her age. You will correct your mistakes as you go along. And inform your good friends, family and be out on the matchmaking sites or join an organization that you like, or gym or a club where you can meet girls. Just work on it and you will be a winner.

--( important)
There is a spiritual side to love & marriage as well.Do browse thru this and follow. Has helped many that i know.
http://sites.google.com/site/drskylovean…

Read the book:
Love will find you: 9 magnets to bring you and your soulmate together
By Kathryn Alice
And you can even join her program, http://www.kathrynalice.com

--http://thesecret.tv/index.html
Read the book, The SECRET(part about winning relationships)

And to help you with talking to girls, read these books.
==How to find, date and marry your soulmate. By simon Raffe.
==How to talk to girls, By Alec Greven

Wish you luck and love.