Google Ngrams says that go back to being friends is a lot more common than go back being friends.
Is the reason grammatical? Or there's another reason? (Or maybe they are equally correct?)
Google Ngrams says that go back to being friends is a lot more common than go back being friends.
Is the reason grammatical? Or there's another reason? (Or maybe they are equally correct?)
"Go back being friends" sounds awkward and incorrect. "Go back to being friends" sounds much more natural.
"Go back" means "return", and "being friends" is a state. After having a falling out, two people may return to this state. Grammatically, this is the same as how they might return to their home towns after a road trip.
Compare:
The two went back to London.
*The two went back London. (bad grammar)
It's the same comparison with your two sentences:
go back to being friends
*go back being friends (also bad grammar)