Boyfriend? Girlfriend?

Today my Thai professor asked if I miss anyone back home. I replied kidthung puan, kidthung fee, or I miss friends and my boyfriend. She laughed and looked very embarrassed, then explained that sharing any information about partners is not appropriate in Thailand, except with very close friends. This is quite different from the US, where having a girlfriend or boyfriend is not a taboo subject. I'll make sure to be more careful so as not to embarrass anyone again!