Time dilation is a great and underutilized storytelling device. Far and away the best example I know of is Gunbuster. Most Western audiences don't want to sit through two and a half hours of 80s anime, regardless of the quality.
I consider time dilation to be an inherently literary format, and Forever War is where the idea is turned up to eleven. There's also a short comic adaptation if you like.
Far better than the treacly Interstellar, in my judgement.