So.. my girlfriend made this new friend who moved here from South Korea and I feel like he wants her, maybe it's just me, he calls her beautiful and tells her to visit his family's restraunt some time, he asks her about her hobbies and she is the first girl that he's talked to since he's moved to the U.S, he has trouble understanding English sometimes and she says he is just being friendly and respectful because that's how he grew up. Is that true? is it part of the culture or should I worrie? (Note: my girlfriend is very attractive and the guy is good looking)