Some might think differently, but since I was born and raised in Korea, I can say I am pretty much very Korean. lol.
Let me give you some tips that you need to know when you are dating a Korean girl or when you want to make your Korean girlfriend happy.
1. Korean girls like publicity.
If you show your affection in public, she will seem shy, but she will like it. That is why Korean men are always very stressed about how they can make the woman happy by organizing some special party or proposal usually in public (or with bunch of friends).
2. Koreans like couple stuff.
Korean couples like to match together. They have couple shirts,
couple cellphone charms,
even couple swimsuits!!
You might need to get prepared to do these things when you have a Korean boyfriend or girlfriend.
3. Korean girls are quite passive in relationships.
They like assertive guys. Many Korean girls say that even though they don't like a guy at first, if he keeps trying and is quite assertive, they will open up and start liking him. So, if you are assertive, she might just follow you.