David's feelings toward Dora?

From the text:

‘Fancy, aunt!’ I exclaimed, as red as I could be. ‘I adore her with my whole soul!’

‘We are young and inexperienced, aunt, I know,’ I replied; ‘and I dare say we say and think a good deal that is rather foolish. But we love one another truly, I am sure. If I thought Dora could ever love anybody else, or cease to love me; or that I could ever love anybody else, or cease to love her; I don’t know what I should do - go out of my mind, I think!’