He has low self-esteem and dare not be too persistent in what he likes.
He is insecure and dare not give too much trust to those around him.
When he thought he would spend his whole life like this, he suddenly met this person.
He doesn't know how to be funny or romantic, but he always likes to lecture others.
Even though he didn't feel any likability, he could not help but move closer to him.
"Hey, teacher, can you change your preaching face?"
"No, if I don't tell you, you don't know how long you will be bored."