I need sometime to write my impression about those manga. I should re-read again lol But i...

I really like mangas with feelings but my heart can't stand sad endings.. Can you please recommend me some passionate ones ( maybe even sad at first) but definitely have a happy ending

Actually i recommend all mangas on this list but yeah the endings is variative, there's a happy end and sad end. But don't worry, for all the manga that has sad ending, i've put "Sad Ending" warn at the description. Ofc it's just for the complete manga, i'm not sure for the ongoing manga cz idk the ending yet haha.
But if you want to know my most favourite from this list, then, i recommend u to read Itou-san http://www.mangago.zone/read-manga/itou_san_kuraka_sui/ . I've put the link for the prequel too on the description.
2nd is Rumspringa no Joukei http://www.mangago.zone/read-manga/rumspringa_no_joukei/
the 3rd is Kabe no Naka no Tenshi http://www.mangago.zone/read-manga/kabe_no_naka_no_tenshi/
and the 4th Kowagaranai de, Soba ni Ite http://www.mangago.zone/read-manga/kowagaranai_de_soba_ni_ite/
Those manga is complete and happy end. This is my "most fav", ofc all of mangas on this list is my "fav", all of them is good and has a beautiful story
Hope u enjoy this list, thanks for ur visit~

Thank you so much for for replying and for your sad ending warning.. I'm definitely gonna read all the mangas on your list (they all seem really good) starting with the 4 ones you just mentioned.. Have a nice day (≧∀≦)

Sure same too you, happy reading ^^