homesick

(adjective) a feeling of sadness about being away from home

Example Sentence:

A: How do you feel about your time in Vancouver?
B: Actually, I’m a little bit homesick, I miss my friends in Korea and my mother’s cooking.

Similar idioms:

1. fresh off the boat
2. hit-and-miss
3. feel like a million dollars
4. show-off
5. under the weather