They were sealed inside lava and ash. Their lips locked in a forever kiss, their love will last forever. Both heroic, they almost made it. But, memorably they stood and decided to face it together. Their love will always prevail.
They were together and that was all that mattered. They stand a little out of Pompeii as a statue forever together. And that's how it should be, there're together. And while it may be sad to you, or really stupid, it was the right thing for them. They love each other, and are now with each other forever.
It may be poetically tragic, or adventurous, but it doesn't matter what you or anyone else thinks. They now live in harmony, in love, together ( did I mention that ), and without anyone in their way, and that's how it should be.