The merging on Earth is temporary. You both keep walking your intertwined paths, but separate enough to function day-to-day.
The cosmic “becoming one soul” stuff shifts to a more energetic connection in higher dimensions. The permanent union (Oversoul/Monad) comes later, with Source beyond that.
Practically speaking, you don’t lose the human side. From what I’ve seen in masculine awakenings, you stay present with each other and share moments. The dynamic evolves, but no dissolving into one blob (that’s the real fear). You still walk this path together here. The big merge unfolds way later.