Lonesome Dove!!! It's everything you described

Set in the late nineteenth century, this is the story of a cattle drive from Texas to Montana. It is a drive that represents for everybody involved not only a daring, even a foolhardy, adventure, but a part of the American Dream — the attempt to carve out of the last remaining wilderness a new life. Augustus McCrae and W. F. Call are former Texas Rangers, partners, and friends who have shared hardship and danger together without ever quite understanding (or wanting to understand) each other’s deepest emotions.

Full mini-series on YouTube l (Robert Duvall, Tommy Lee Jones, Danny Glover)

Four book series

I have read the series twice. Super immersive, engaging, romantic, masculine. Please please please check them out!