Thankyou, I love you, i'm sorry
ty in advance friends
if you saying this to friends, then smth like:
Thank you - 감사해요
I love you - 사랑해요
I'm sorry - 미안해요
if you wanna tell this to person who older than you:
Thank you - 감사합니다
I love you - 사랑합니다
I'm sorry - 죄송합니다