https://www.mangago.me/read-manga/i_hate/
dark heaven?
i have this manga in mind but youll get spoiled because of the detail you requested... its a really really good bl manga and ill never get tired of recommending it but i dont want to ruin the experience for you
but this ones good too, ongoing tho https://www.mangago.me/read-manga/kouguu_no_omega/
https://www.mangago.me/read-manga/dear_gene/ its so beautiful T^T
Can someone recommend me a bl where they get separated and after sometime meet again.. [ something with angst ]