I recommended this site to a few people and now they want me to friend them. They gave me their MDL names, but I'm don't know how to find them so I can friend them. Can someone please help me? Thanks!

Click on the tab to the right of your profile pic(triangle pointing down). Click on friends then user search. Once you find a friend, you can add them using button next to their name.  I hope that helps.

On the drop down menu, click friends. Then on the top right there is a user search. You can put their name in there.

If that had been a snake, it would have bit me! LOL Thank you chingu.