Definitely take more long-rests in act 2. Sometimes scenes can queue up and it might take a few rests to work through them, and some may have higher priority than others, though I've not been able to figure out what scenes get priority personally. The Wyll dance scene is scripted to play (as long as you initiated the romance by flirting in act 1) after you enter the shadow cursed lands and get Mizora's second quest to save the Zariel agent.
After you get the dance scene, there actually aren't any more romantic scenes with Wyll until a decent way into act 3,
after you rescue Ulder Ravengard (and he's alive), you'll have another romantic scene, Wyll gets a "!" and you will get his act 3 scene.
As long as you have the ability to talk to Wyll about your relationship and ask for a kiss, that means you are partnered, according to the game.
