Were they lovers? In the movie Qi'ra told Han that she wasn't "with him" but she "owed him". Yet when her and Dryden appeared together on screen they definitely seemed to care for eachother as though they were in some sort of relationship.
"A great tactician creates plans.
A good tactician recognizes the soundness of a plan presented to him.
A fair tactician must see the plan succeed before offering approval.
Those with no tactical ability at all may never understand or accept the plan.
Nor will such people understand or accept the tactician.
To those without that ability, those who possess it are a mystery.
And when a mind is too deficient in understanding, the resulting gap is often filled with resentment."