They fell out with each other over trifles.
They fell out with each other over trifles.
They are arguing every time they see each other.
They were always quarreling with one another over [about] trifles.
They fell out with each other over trifles.
They compete with one another.
They had a discussion together.
They fought together.
They both fought.
They are on good terms with each other.
They are sympathizing with each other.
They broke up over fighting.
They broke up because of arguments.
They fixed up a quarrel.
They soon became quite accustomed to each other.
They are both close.
They cherish discussion.
They soon became quite accustomed to each other.
They rob, and furthermore cheat each other.
They were criticizing each other.
They think about each other a lot.