
You know stories like this are always 8.5+ rating. Maybe people don't like things that are super angsty and dramatic but I like spicy things

Not sure that's a true case. A lot of webtoons that are super angsty, and worse, long soap opera type melodrama are rated higher. Most of them have bad art, too. I think they were rated higher because the faces were drawn pretty (aka, K-pop and k-drama standards).
I also noticed that older mangas (10-20 years ago) are rated lower ┑( ̄Д  ̄)┍

Majority of stories like this ends with both of them being immortal. But is there a story where one of them remain human and died? The only story I read like that was "This Witch Of Mine" where the guy died from old age while the other remains immortal. I know it'll fucking hurt so much but I like hurting myself so...
Stories like this makes me wanna go back in highschool and changed my career. Like I shouldn't just given up and did my best lol