Obsession.

So, you became obsessed with him because stupid Swerve made a wish for you to love Rodimus more than anyone else in the world, and now Rodimus seems really scared.

As you've already figured out, Rodimus is in love with you but can't bring himself to confess his feelings, and good old Swerve comes to the rescue! Hee hee.

And I'M SO FUCKING SORRY I WAS AWAY FOR SO LONG, I'm just a lazy little ass. (ФωФ)