I hate the break up arc in R because it was pointless, a dumb test by king lavender geez if you doubt she loves you or that you doubt your love for her after all these years then maybe she's not the one for you mister 2098 face, not to mention the stupid timing, really, right after they've gotten back together, first Beryl killed them in the moon, being reincarnated with no memory, finally remember who they were but just then having chiba kidnapped and brainwashed in Classic then only for chiba to die after being healed and memories back, Usagi makes her wish and boom the memory loss again now in the Ali-En arc yadda yadda yadda moonlight knight (which was an impovement to his character wish he stuck around in that form) takes his place until his memory returns officially. now things were finally hunky-dory in chiba x usa loveydovey land, until a new enemy appears as well as a mysterious child that the enemy is after after aka your own kid mr. I'm king of earth in the 30th century, god help us, this time could have been perfect for the two of them to take care of Chibiusa and learn how to raise a child thus making them get closer as a couple plus more focus on dealing with the enemy without the unnecessary distraction of these two suddenly breaking up the way they suddenly got together in the first place. And future king endymoron picks this chaotic time to test their love? I would never do that. Stupid stupid stupid plan, making poor Usagi suffer like that all to see if your love can withstand the test of forced separation by sending dreams to your past self right after getting your first chance to be together. They also could have ended it in the sleeping beauty episode but nooooo it had to continue like we need Usagi to suffer more, sure chiba was suffering too but what do expect from the same nightmare night after night with King Freddy Krueger invading your mind showing Usagi dying? Lover or not nobody wants to see the person you protect every day getting killed in a dream. And I'm not buying that miracle romance hogwash either, only after the Crystal appears and identities discovered and that whole zoi stab thing do they fall for one another, sure they warmed up to each other leading up to that but that was just going from acquaintance to friends, as far as that in the anime version is concerned Chiba only cares for Usagi because she was once Princess Serenity, obligated by "destiny" to be with her with the past sending him dreams forcing him to find the princess and the knowledge of crystal tokyo/chibiusa existing in the future forces him to stay with her plus protecting the world and that's it. Serenity could have been anyone and what if it were say... Minako? Chiba and Usagi would never be a couple in the anime if that was the case, I can see them as friends maybe but lover's? Not if you take Usagi being Serenity out if the equation. As for Usagi crushing on tux ha! Just a school girl infatuation, she's does the same with Motoki, the only difference is the rescuing honestly I wish Motoki was tuxedo or anyone else for that matter, anyone but this guy.
Of course the manga/PGSM is different, their friendship/relationship develops before identities are known which is the better way to do it if you ask me and there was no stupid break up arc.