Congratulations. You are still collecting diligently. Please have a look at page 1. There is an explained which badges are possible. You will get your first badge when you have collected 5 friends. Thank you very much.
@Pitty_Kitty is it true that so far you only have the badges for 5, 10 and 15 friends? With currently 43 friends, you would still get the badges 20, 30 and 40. Am I right?