tap on the Bart and Milhouse icon to go to friend screen
tap on the shaking hands icon
under friends tap the right name badge icon
Click Invite next to EA account
tap in the name field and enter an ea account name even though it says email
click done
if you do not have these options, do you have an ea account of your own? you also must tell the app you are older than a certain age for the social part to unlock, varies by country, USA is 13 I believe.
Let me know if this helped