Board Thread:Show-Related Questions and Answers/@comment-26569765-20190817223628/@comment-24029015-20190819044925

What David and MM shared under the curse was far from True Love. True, their real identities in the Enchanted Forest had a relationship of TL but, under the curse, the circumstances and context was very different. In the EF, Abigail wasn't much of a factor as she and David were only betrothed and Abigail didn't love him anyway but, in Storybrooke, Kathryn "loved" him and - after waking from the coma - his "memories" of loving her made things more complicated. Plus, there was a lot of secrecy and doubt surrounding their affair during the curse and MM getting framed pretty much destroyed their relationship until the curse broke.

Snow and Charming truly loved each other, but it wasn't the same with David and MM.