Usually they call sexual activities as "skinship" which is directly translated from english and pronounced the same way.
my love
i think it will be Saranay...
내 아들을 사랑 = i love my son
sah-dahng-heh
oni, sa na ei yo.
I LOVE YOU -It doesn't mean i love you.It doesnt really have a meaning in the Korean language tho. I am a Korean native.I asked my parents and grand parents and my Korean speaking family they say it does not.
wae 왜
north korean language is the same with south korean language and they say annyung 안녕!
jeogge
keomyuniti
ama
dal