I thought the movie expresses the belief, that you can't help who you love, with great conviction and credibility. Anne Hathaway and Nicholas Galitzine were darling together, and they were likely able to sell the reverse gender plot, of an older/younger relationship, in part because of their good looks. Whatever the reason they were able to make me suspend belief to at least give in to their possibility.
When you love, it's a mistake to let it go or suspend, otherwise you spend the rest of your life looking for and wanting the love you lost.
The moral of the show: Love is love and comes in lots of different combinations. Live your own truth not what other people think your truth should be.
And once you find it, figure out how to keep it. It's the secret to a life in rare air.
A.R.