In the 3 years that followed their separation ... *SPOILERS*
After escaping, Han, with his newly given surname 'Solo' achieved getting kicked out of the flight academy and amounted to nothing more than lowly soldier - eventually being sentenced to be killed. His ONLY goal was to earn enough money to buy a ship so he could return for Qi'ra, sadly he had nothing.
Qi'ra, after *not* escaping, managed to become a 'top' lieutenant, the right-hand for the regions largest crime boss, seemingly adept at all manner of negotiations as well as highly proficient at combat - and also a sith in-waiting?
The development timeline seemed odd while watching this film ...
Han also didn't freak out when he saw her, she was the only reason he was doing what he was doing in the first place ...