It depends on the mood of the person who said this at that time. I feel there are many explanations: first, as upstairs said, it was not others, but myself. Although he is still alive, life is worse than death, but he can't die. There is a feeling of helplessness and yearning, yearning for the life you yearn for, but it can't be realized. Therefore, although it is still true or not, but a heart is buried in my heart, no one talks. Second, there is a kind of unrequited love and wishful thinking about feelings. I love each other very much, but I can't love them for various reasons. If I fall in love with someone I shouldn't, I can only bury them in my heart and combine them with the soil in my heart forever. Third, it doesn't mean anything, just rhymes. It sounds sad and refreshing. I can't analyze other connotations for the time being.