This story lacks structure. Perhaps consider thinking in terms of set up (where we meet Christos, and possibly his ex), then an inciting incident (where Christos gets dumped), a midpoint (where Christos must make some kind of choice) and a good climax (where he confronts his ex, trying to get her back, perhaps). These are just some suggestions. As it stands, the story feels a little random. A guy walks down some path, calls out to God, coincidentally bumps into his friend and laments over his ex. An ex we haven't even met. There's also tons of exposition in the dialogue. I will applaud the symbolism with the plane, though, as well as the little character arc Christos has, though it's all a bit undercooked. Perhaps consider making this short a little longer to explore the story more.
