This is how to accept a friend request on facebook Lite:
1.Login to Facebook lite at lite.facebook.com
2.On your home page you will see a message that says"You have 1 friend request." just under the post photo Button.
3.Click on the blue writing titled"friend request."A new page will appear showing you who has requested to be your friend.
4.On the right hand side you will see two buttons namely "Confirm Friend" or "ignore".If you don't want to be friends with this person click Ignore,if you want to become friends on facebook then click"Confirm Friend"
You have successfully accepted a friend request.
