I thought it was a Nick Hornby book, but I looked through the descriptions of his books and it’s not jumping out.
The main thing I remember is this guy (who is seeing someone at the time, I think) has a crush on this famous or semi-famous woman. She has some private images leak and he, you know, is not longer master of his domain, to those leaks making him more enamored with her.
Somehow they meet and end up getting together.
I remember the style being like Nick Hornby, and I’m pretty sure it’s an English author.
That’s all I remember, other than I liked it and may read it again.