You have been dating Chan for a year.

Chan was surprisingly quiet today and didn't speak to you while he was at home. He never did that

He always shows his true personality with you

You got slightly worried and went to his study room to check on him

He didn't notice you as he was sitting at the desk and watching some videos on his laptop, while his leg was shaking slightly

He looked stressed, like something happened to him

Something must have happened at the airport today.