Does not 100% fit your description, but is very close so absolutely Too Late To Say I Love You!!!
The leads both love each other passionately, but the ML is a general in the army in war time China. It's not an easy job! He has to make tough decisions for the good the country, but which isn't always good for his relationship with the FL.
Their love affair is intense, they're like a drug for each other. The FL goes to great lengths to be with & get her man, even defying her parents in conservative 1930s China, where filial piety is paramount. And even when he does things that hurt her deeply.
It can be frustrating at times & the ending isn't perfect, but I think this might be the drama you're looking for! I loved this drama for it's intensity, esp the romance, because it's unlike any drama I've seen in dramaland before or since! :)