Is there an easy way... probably not
A segment could definitely work.. but how many back and forths do you add in... You could also try a flow diagram, but are you interested in direct movement between A and B? Or any sequence with other page in between (i.e. Page A > Page B > Page C, D, E, etc > Page A > Page F > Page B)?
The problem with flow (is that it can get a little unwieldy as you add more columns)
Another option is to have events that fire on Page A and another on Page B... then look at Visits that have count greater than 2 on both pages (or maybe 1 for A and 2 for B, or 2 for A and 1 for B, etc)...
Visit Level Segment
Page A Event >= 2
AND
Page B Event >= 2
For example... this should show you only visits where the user saw Page A two or more times AND Page B two or more times... But this could have any other pages in-between... its not limited to direct linking between pages (but then neither would your "THEN" rule above, unless you added a within 1 Page View modifier)