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This is the only thing I can think of off the top of my head - http://www.mangago.zone/read-manga/overdose/
But it's not that drastic. It has angst but then a happy ending
http://www.mangago.zone/read-manga/hero_heel/
Sort of... the seme's kind of a jerk. The uke's love is more innocent than "I'll give everything to you". But I still really like the manga.
Yaoi with one-sided love from the uke that sacrifices every thing for the seme but the seme is a jerk who doesn't care about him