Need a cheerful, romantic, feel-good book for a guy I’m dating

Hey Reddit!

I need help picking a romantic, fun, cheerful (not sad!) boy-meets-girl type book to gift a guy I’m dating.

A little context about him (because he’s… a lot):
He’s an avid book reader, physics/maths nerd, polymath, top CPer..

Looking for more romcom than drama, Romantic (boy + girl love story), Flirty, fun, cute
No tragedy, no emotional heaviness but still with intimate/romantic moments.

Top rated (available on Amazon) book.. Something he’ll enjoy reading, comedy will be cherry on the cake.

Would love to hear your top favorites or any book that fits this vibe.

Thanks in advance!! 💖📚