
here's a thread 4 you :
https://www.mangaupdates.com/showtopic.php?tid=36517 :)

http://www.mangago.zone/read-manga/mademoiselle_butterfly/
I don't know about others but I cried several times while reading this. Happy ending.
http://www.mangago.zone/read-manga/love_so_life/
HUGE tearjerker & filled with fluff. Happy ending (not scanlated completely yet but I have read it till the end on Otakumole, so rest assured)
http://www.mangago.zone/read-manga/delivery/
some stories have happy ending & some not. But all of them are tear jerking. Deals with some disturbing contents like prostitution, rape, suicide, miscarriage. So, avoid it if you don't like that.
http://www.mangago.zone/read-manga/replay/
A deep story. Has a tragic but different kind of bittersweet happy ending.
http://www.mangago.zone/read-manga/anya_kouro/
http://www.mangago.zone/read-manga/the_hands_the_demon_adored/
these 2 are oneshots. So I am not spoiling it. Both have different type of happy ending depending on how you see it.
And, I don't know whether I should recommend you "Wish" by CLAMP or not. Because it's actually neither/both shounen ai/shoujo (you'll understand if you read it. it's hard to explain without giving spoilers). Has 1 of the most beautiful heart wrenching story I have ever read.

http://www.mangago.zone/read-manga/hajimari_no_niina/
Try reading this one, I cried so many times while reading this and yes happy ending! :)
Guys, can you please recommend me some tearjerking manga with a happy ending? But please NOT tragedy and NOT yaoi/ shounen-ai (● ̄(エ) ̄●)