Ok so this tutorial doesn't actually teach you the art of making friends as much as teaches you how to add people to your simExchange friends list and be simExchange friends! Yes! What more could you want out of life?
After you've identified some prospective friends (maybe people you know IRL--In Real Life--or some people you've raided with in a game or have had deep conversation and connection through the simExchange forums), go to the Pending Friends page in the Community Section.
On the right side you will see a box like this:
Typing a username and CLICKING the "Invite" button will result in this:
And then the middle of the page will list your new potential friend likes this:
This individual will have to confirm your bid for friendship before you will become true simExchange friends. Then you can compare each other's leetness on Your League.
Alternatively, you can also click the Add Friend link at the top of their profile page. You can view their profile by clicking on their name or searching for them in the search bar.