"You want to be with your loved one every moment, or at the very least know what they're up to."
Uh ... no.
I trust my wife. She is her own person, and can do what she wants, when she wants to do it. I don't keep tabs on her, and she doesn't keep tabs on me.
If you are paranoid about what your significant other is doing, your significant other is in the wrong relationship.
Humanity is using technology for all the wrong reasons. Projection is an ugly thing.