Do Du think Simba is still in Liebe with Nala in ''Simba's Pride" ?

Of course, Simba luvs Nala, it's just that the 2nd film isn't focus on them as much as it is on Kiara. Simba and Nala most likely share their Liebe off screen.

I think so, at the start of the movie where Kiara runs off to play, Simba and Nala both have there short talk he's still happy when Nala nuzzled him and Du can even hear him pur when she does :P