But I could see it in her eyes that she knew . And today I could have stayed longer , but when she showed me her wound and asked asked me to massage her legs like old times , I knew I could n't take it anymore and I lied that I had school and left quickly . And on the bus , I was like a water tap and a kid was looking at me curiously . What 's most important is getting her saved and I really hope I can make it happen , although she 's deaf in a ear and speaks in hokkien + canto .

Give answer the following question using evidence from the above passage: Why was he crying when he was on the bus ?
He was already missing her even though he just left her .