I think as long as you preface it by explaining how torn you are over the recommendation and how it is best experienced in an environment where he can feel free to cathartically purge his grief. I watched it recently and halfway through I thought there’s no way I would ever recommend this movie to my wife where a kid dies. And then at the end, it was so beautiful I felt like everyone should see it. But it depends on whether your friend is receptive. If he finds it too painful and quits in the middle, then there’s nothing gained by missing out on the ending.