A book that is essentially a love story at the core of it, but not essentially a romance

I’m quitting my part time job soon and that is how I used ti save up for books. I want to get myself a couple of last books before I go on a pretty long book buying ban.

Currently I’ve decided to get
– This is how you lose the time war

– In Memoriam (rethinking this, cuz I have Young Mungo on my immediate tbr and that is also a sad gay novel)

Please suggest something so good that I HAVE to have a physical copy of it.
A story that is at the core about love and humanity. It doesn’t have to be romance, it could even be about friends and strong platonic love.

A book that will stick with me long time after I read it.

Also NO fantasy and YA recs please. Looking for contemporary/ general fiction recs.

by AdhesivenessOwn7747