Ross and Rachel were off and on throughout Friends, but there are a few quotes that prove neither of them even wanted to get back together.
“It Doesn’t Matter What You Say Or Do. It’s Just Changed Everything. Forever.”
“That One Night We Had Was Fun, And Certainly Passionate, But Don’t You Think It’s Better If We Just Stay Friends?”
Exes relapse all the time, so Ross and Rachel falling back into bed together didn’t come as a shock. Despite their hookup, neither of them wanted to date again and Ross preferred they remain friends.
Ross and Rachel had plenty of opportunities to get back together over the course of the series, but they only seemed to be interested in one another when they were seeing someone else. There was more possessiveness between them than there was love.