I like slow-burn stories with a long period of mutual pining, good writing that doesn't feel rushed, and satisfying endings. I want well-rounded characters and a happy ending. Modern or historical settings are both fine. I really love this kind of romantic tension. Does nobody get it? Both characters already know how they feel, but they still keep dancing around it...
A fantasy novel for adults, full of excitement, desire, and defying the heavens. "Is Your Life Enough to Pay?" By Bu Qiu Zhang. The male protagonist starts out dumped and impoverished. He unexpectedly obtains a cultivation inheritance. He cultivates the Supreme Forgetfulness of Emotions, yet insists on controlling cause and effect—whoever wrongs him will be repaid a hundredfold; whoever loves him will be protected with his life. Along the way, he encounters various girls, each one treating him sincerely. Dual cultivation is both a deepening of their relationship and a breakthrough in their cultivation. From mortal to the pinnacle, he achieves: to have his beloved forever, and for the world to submit to him.