He has no idea since when he has been snared by the same trap.
Being betrayed, he broke up with his girl friend.
But he still misses the old time despite each time he thought about the past, the agony pulls him so hard, he derails his life. 

Whenever he wants to break away from his past, he'd begin to worry that if there is anyone fixing her bad light bulb or carrying heavy things for her.
If there is anyone bringing her a cup of water every night and putting it by her bed for her.
Again and again, he hesitates about the course of navigating away from his past.

She had no idea since when she has been snared by the same trap.

She broke up with her boyfriend after confessing to him that she had betrayed him.

She still misses the old time.
But whenever she tried to make up with him, he cut her off.
And whenever she has made up her mind to start her life all over again, he expresses his care about her.