There is one called stigma it does have a lot of trauma tho (●'◡'●)ﾉ but its really good its exactly what you described its a bl it says its a yaoi but i think differently (●￣(ｴ)￣●)
Cocoon of the Heart
codependency (they're all messed up)
http://www.mangago.zone/read-manga/hikizuru_oto/ - he was in an accident and had to be taken care of so they always stick together (one shot)
http://www.mangago.zone/read-manga/camellia_minami/ - the older brother basically convinces his younger brother he can't do anything without him (tw: incest, abuse)
http://www.mangago.zone/read-manga/bakadane_shitteruyo/ - incest again (brother complex) , one shot
AOAOAOA THANKS EVERYONE!! (≧∀≦)
I am looking for a bl, gl, shoujo heck any genre is fine, where a character A takes care of character B in an overly way so that B becomes too incapable and cannot live without A