You'll have to face it, the endings are the same however you slice it. Don't be deluded by any other endings, they're all fake, either deliberately fake, with malicious intent to deceive, or just motivated by excessive optimism if not by downright sentimentality.

The only authentic ending is the one provided here:
John and Mary die. John and Mary die. John and Mary die.

So much for endings. Beginnings are always more fun. True connoisseurs, however, are known to favor the stretch in between, since it's the hardest to do anything with.

That's about all that can be said for plots, which anyway are just one thing after another, a what and a what and a what.

Now try How and Why.