A romance book for someone who is afraid of romance books

I never was a romance reader and probably never will be. Sometimes I enjoy romantic subplots and I read some books that had good romance in them but those books were always belonged to some other genre. Everytime I picked up a romance book I ended up discarding it halfway through because it was "a teenage highschool girl falls in love with her mysterious ultra handsome new classmate who is actally a billionare mafia boss and half werewolf" type of thing. It damaged me deeply to the point where I fear touching anything that even resembles romance from a distance.

Still I don't want to lose hope that there is a romance book I might enjoy and I'm looking for a breath of fresh air right now.

I don't orient myself in the genre but here are some of my requirements:

• I want a book that's targeted at adults but I don't want to read erotica (implications of sex or short mentions and descriptions don't bother me but I don't want to read several needlessly explicit paragraphs about two characters fucking each other).
• Though I usually read sci-fi, dystopia and fantasy I don't want the story to have fantasy settings and I'd very much prefer if they weren't sci-fi or dystopian. I'd prefer real world settings in this century or the end of the previous one.
• I don't care if the characters are straight or gay as long as their sexuality is not handled in a stereotypical or fetishizing manner. (I guess this applies to any character trait.)
• I don't have time to read 50 books a year so I'd prefer a book that has proven to be good through time. Not necessarily a classic but something I'll remember instead of the newest NYT bestseller everyone will forget in a month.

Long story short, I'm looking for something you'd confidently recommend to your grandma or your dad without it resulting in your removal from their testament or them dying of boredom.