Leave Yesterday Behind (1978)

Paul was injured while playing polo. He then learns that he is paralyzed from the waist down. Feeling despondent, he decides to go to his grandfather's ranch. He meets Marnie a horse trainer. For some reason she decides that she wants to get him to get his head out of the sand that he placed it in since the accident. She finds herself falling for him and he for her, too. But he tries to resist cause he doesn't know what kind of future, he could give her, cause he fears that he could be impotent.