I hear a lot of people talking about this in terms of right-and-wrong, like DON'T date bc you could be "dragged down". Or only date if you are firm. Standards, conditions, ect. that make it ok or wrong. But let's take a look at a different perspective.
When reading that verse, it does seem pretty obvious what the author's view on the matter was. God doesn't want us being hooked on a non-believer in the way a romantic relationship tends to hook you. But WHY? because you are so weak boned that you will suddenly abandon your Savior and start living a hedonistic sinful lifestyle? Maybe, but maybe not.
As someone who dated and then married a non-Christian, I personally believe God doesn't desire us to be yolked together with non-believers because He loves us and wants to protect us from the hurt & pain that comes from a genuine believer having to live day-in-day-out with an opposing force. And it is incredibly painful. It is so heavy to know that the one person I am closest to in the world cannot share the spiritual life I love so much, and knowing that he (as of now) will not be with the Lord in eternity is simply heartbreaking. I made the mistake and I wish I would have looked to the Word of God instead of the desires of my heart.
Hope this helped.