I have it running ok but it shows my own username in the friends list. How do I fix this?

Does this happen in the users list where you add friends or your actual friends list? if its the users you could convert the NSArray of users to an NSMutable array then remove your user name after you query the backend for the users and remove it that way

NSMutableArray *mutableUsersArray = [NSMutableArray arrayWithArray:self.allUsers];
[mutableUsersArray removeObject: self.currentUser.username];

or just use a query constraint which is easy as well if you wanted to do this on the backend side of things. see the documentation on queries for more info. I would probably use a query. I dont really like using mutable arrays too much in my code.

if this is happening in your friends list double check parse and see if you added yourself, remove yourself from that relation if you did, then implement one of the solutions above in your users list so you cant add yourself as a friend

If you keep going you will learn how to remove users from your friends list then you can remove yourself.

I think a cool extra credit feature would be to add a check in the displaying of friends. Something that says display all users except for the current user. You can look at the Parse Query documentation for more information regarding that.

https://www.parse.com/docs/ios_guide#queries/iOS

Particularly the query constraints section that shows this example: [query whereKey:@"playerName" notEqualTo:@"Michael Yabuti"];

That would be a great feature to add and I hope you add it! :-) If you have any other questions I'm always available. Although I'm a complete beginner, discussing this only helps me get better.

Edit: That is the beauty of development. Stone Preston just gave a completely different way of doing the same thing. :)