I could be wrong but to me it seems like none of it is about a break up directly but about being in a situation in which the person is close to death and there is no way out.
He wishes he didn't separate with whoever because there is no one he'd want at his side during this situation more. Other parts are about his last thoughts such as "I don't wanna die" but it is mainly about how he won't be with his partner and he has missed out on living life with someone he loved and that in a near death situation, this will be the biggest regret of all.
This is just what I get from reading through it and I could go into more detail but you get what I mean and like I said, I could be wrong.
I could be wrong but to me it seems like none of it is about a break up directly but about being in a situation in which the person is close to death and there is no way out.
He wishes he didn't separate with whoever because there is no one he'd want at his side during this situation more. Other parts are about his last thoughts such as "I don't wanna die" but it is mainly about how he won't be with his partner and he has missed out on living life with someone he loved and that in a near death situation, this will be the biggest regret of all.
This is just what I get from reading through it and I could go into more detail but you get what I mean and like I said, I could be wrong.