I think Harry is totally in love with her - well why not, she is stunningly beautiful, has the most gorgeous speaking voice, and seems to be generally a nice person.
The big BUT is that she clearly didnt really get what she married into - the duty, the protocol, the boredom...
So given that he is smitten, and she's clearly said this 'fuck this for a skylark' he is doing what she wants (I think). I only hope they remain happy, not a burden on the public purse, and not an embarassement.