Saranghae (사랑해) means “I love you” in Korean. There are some variations on how to say it, which are further explained on the Kimchi Cloud website:

“saranghaeyo (in Hangul: 사랑해요)

The More Formal/Polite Way

If you want to say ‘I love you’ to your parents, you add ‘yo’ (요) to the expression we learned above and say ‘saranghaeyo’ (사랑해요). But unless you have Korean parents or other relatives who speak the language, it’s unlikely that you will find yourself using this very often.

saranghamnida (in Hangul: 사랑합니다)

The Most Formal Way

Because ‘saranghamnida’ (사랑합니다) has a very formal feel to it, this form is not very often used in everyday conversation. You might occasionally stumble upon this in lyrics or poems or in places or situations that require formal Korean.”