The irrelevant “lovey dovey” material is withheld by OIC/DOJ on purpose. This has been said/told to Congress. Residual hormonal-driven chat appears only because it is part of relevant communiques.
That seems quite plausible.
The other theory is that they were never lovers, but that the lovers story was used for other purposes - to draw attention to them, to hide selected texts, etc.
Right now I’d give even odds for either scenario. Not enough evidence to sway me on either side.