The main topic of the film is suicidality in context of close relationships. But its focus is not on the suicidality itself. Instead it gives insights into the thoughts and feelings of a close person / partner who never had any suicidal intentions themselves. It therefore provides a very different new perspective on how one can possibly think about suicide and a close relationship to someone who is facing this problem.
Sorry, but for now we weren't able to find movies like I Can Only Do So Much.