Yea but.... after Natsu says "I don't care about any of that stuff" Natsu also said "cause we'll always be together, right?"
this pretty much implies that Natsu is trying to say that he doesn't need to say i love you because they already know they love each other and Natsu and Lucy will always...
I just completed reading the last Fairy Tail manga chapter and all the ships seem to be canon even nalu,but wasn't it always canon, i just finished watching the Tartoruos arc for the second time and the last to episodes of fairy tail zero when Natsu returns.
Natsu and Lucy seem to really care...