When you break up it is literally impossible to return back to “normal.” Something has permanently changed between the two of you because someone made the call that would hurt the other, or both equally. Maybe it could be beneficial because you realize how much you need and love the other person, so the permanent change is a new drive to foster love, but most of the time it is just something lost. 

I once read somewhere that breaking up is like taking a bandaid off. Once you take it off, it never sticks right, again.