Hereeeee
http://www.mangago.zone/read-manga/lover_boy_lezhin/ (also happy ending just v angsty, this is a manhwa)
http://www.mangago.zone/read-manga/cosmic_boy/ (happy ending just angsty, also a manhwa)
These three are manga:
http://www.mangago.zone/read-manga/the_wolf_lord_s_lady/ (betrayal etc but it's probably gonna have a happy ending)
http://www.mangago.zone/read-manga/haru_no_noroi/
http://www.mangago.zone/read-manga/deep_love_ayu_no_monogatari/ (Big tw of r*pe with this one, it's not light hearted, I'm warning you)
thanks
thank you
need some heartbreaking manga either shoujo or Bl