Earth didn't show much affection towards Mix in front of the camera, no hugs, not much sweet words, but he is very attentive and his small gestures worth more than a thousand words. They know they care each other privately, otherwise their friendship won't last for almost 8 years. When Mix passed out at the mountains, we can see Earth's reaction, his feelings were so genuine.
when someone is whipped, it basically means that they let their romantic partner have a great deal of control over them, i.e they will do anything for them