I mean, I knew what it was about and I still read it, so that's on me. Definitely made me cry. Poor girl.
I get that the ending could go either way, with her actually being a ghost and her just being a hallucination. Maybe it's a mix of the two, that she's lingering even though her friend can't actually see her. Mostly based on the line about how happy she must be in heaven to have someone on Earth who loves her so much. Yeah... I guess that makes sense, so I suppose it does have that supernatural element, unless it's more of a metaphor. Either way.
Shii-chan