As for the BFF requirement of Friend of the World, since it's bugged there is really only two ways to fix it.
- Choice A - You must be mean to your BFF until the green bar is almost non-existent. Just before it disappears and begins turning red you will notice you are no longer BFF's. Another sim mentioned if you call your BFF at night when they are sleeping, over and over and over again, it drops the relationship bar also.
- Choice B - Hit Control+Shift+C to open the console. Type "testingcheats true" without quotation marks. Then type "aspirations.complete_current_milestone" and it will finish that step for you.
Until the bug is officially patched, these are the ONLY options.