Heartstopper for Grownups?

Looking for a book recommendation. Has anyone read anything with the qualities of Heartstopper but aimed at adults? I realized I’ve never read a grownup gay romance that I truly liked. By “qualities of Heartstopper” I mean a true romance, that’s not bitter or cynical about romance. I don’t mind serious themes, as long as it’s not the cliché of one lover has like terminal illness. Also - something set in the real world please!

I feel like this is gonna be hard to find. Thanks in advance!