Another sad story of true lovers could be that of Orpheus and Eurydice. Orpheus was a great musician and he fell in love with Eurydice. But she died from a snakebite. Orpheus was so in love that he journeyed to the underworld to get her back. He was allowed to take her as long as he didn't look back at her until they were out of the underworld. But in his eagerness, he looked back and lost her forever.
In a 'true lovers sad story', fate usually plays a big role. It's like the stars are against the lovers. Take Romeo and Juliet again. Their meeting and falling in love seemed doomed from the start given their family situation. Sacrifice is also an element. Orpheus sacrificed a lot to try to get Eurydice back, even facing the terrors of the underworld. And of course, unrequited or unfulfilled love is a key part. Tristan and Isolde could never have a normal relationship because of the circumstances.
Heartache was a way to express one's feelings. One could express one's inner pain and sadness through words. These sentences usually described the feelings of losing a loved one, being hurt, or feeling lonely. The purpose of these sentences was to let the readers empathize with the author and understand his feelings. While these sentences may resonate, they don't really solve the problem or alleviate the pain. If you are experiencing emotional distress, it is best to seek professional help and support.
I don't think it's a true story. It could be inspired by various elements but not a direct account of actual events. Fictional stories often use dramatic and imaginative concepts to engage readers/viewers.