User blog comment:Looperreallyreallysucks/Pure Evil Discussion - Avengers: Endgame/@comment-2175012-20190509022234/@comment-25075214-20190509023056

If he did really love her, he would've chosen better not to wipe out the universe, but he just let that slide for the sake of his own ambitions. Plus past Gamora was not very pleased by this change of plans and allied with the present Nebula to defeat him for good. So I would say that this whatever love that past Thanos had for past Gamora, he may have just abandoned it.