I'm so heartbroken today because I just read 2 depressing mangas. Now, I want to read some...

http://www.mangago.zone/read-manga/seishun_sanka/ I think this is exactly the type of manga you are looking for.

Other fluffs:
http://www.mangago.zone/read-manga/sasaki_to_miyano/
http://www.mangago.zone/read-manga/kimi_ga_terasu_koi_no_hikari/
http://www.mangago.zone/read-manga/henshokuka_no_kawaii_akuma/

I dont know if the ones i recommend is exactly what you ask... but its for sure cute, light and fluffy stories.... and most importantly.... its finished so no cliff hangers lol

http://www.mangago.zone/read-manga/umeya_kun_no_haru/
http://www.mangago.zone/read-manga/goshujinsama_wa_ouji_ga_o_suki/
http://www.mangago.zone/read-manga/rakka_ryuusui_no_hoshi/
http://www.mangago.zone/read-manga/kiraide_isasete/
1 (prequel) http://www.mangago.zone/read-manga/suki_tte_iu_na/
1 (sequel side pair) http://www.mangago.zone/read-manga/kirai_ni_wa_narenai/
(This one kinda on point) http://www.mangago.zone/read-manga/can_i_touch_your_inside_deeply/
((^infact, anything that mangaka made is really good))
2 (prequel) http://www.mangago.zone/read-manga/xxx_allergy/
2 (sequel) http://www.mangago.zone/read-manga/secret_xxx/
2 (sequel side pair kinda heavy tho sorry) http://www.mangago.zone/read-manga/therapy_game/
3 (prequel) http://www.mangago.zone/read-manga/yowamushi_danshi_renai_hajimemasu/
3 (sequel side pair maybe on point) http://www.mangago.zone/read-manga/ore_no_kirai_na_senpai/
4 (prequel) http://www.mangago.zone/read-manga/you_re_my_princess/
4 (sequel side pair maybe on point) http://www.mangago.zone/read-manga/oujisama_dochirasama/
http://www.mangago.zone/read-manga/otameshi_delivery_lover/

These ones are the more recently completed list that i could give you.. enjoy!