Do you think there will ever be a time when Ethereum will stop following Bitcoin?
No.
The time Ethereum goes up in value is because Bitcoin goes up in value. In the future, will people look for Ether first before Bitcoin? Or will it always be Bitcoin's sidekick

What do you guys think?
It will always be correlated to bitcoin's price. That's why when we look at it, bitcoin goes up and ethereum goes up too. And when Ethereum goes up, the other altcoins are also going to go up too. That's the domino effect of bitcoin and to all of the altcoins in the market. As a store of value, people will look for bitcoin first.