Do you think that Simba and Nala would have fell in love if they had grown up with each other?

I think they would.

I'd like to think so.
:)

Yes

Of course. And then they would love each other more!

Of course! They fell in love even when they didn't grow up with each other. If Scar hadn't scared Simba away, then it would probably be of a more likely chance.

They would.
(1) They were betrothed
(2) Cubs known to play with each other
are more likely to mate as adults.
(3) They fell in love in the movie