Read the following context and choose the best option to answer the question.
Context: He had been writing down the lyrics while he thought of them and read through them quickly . He could n't help the bursts of laughter that bubbled up . It was the most lovesick thing he 'd ever seen , but he liked it .
Question: What may be the reason for him laughing at himself ?
Options: 
- He is awful at writing .
 - He was proud of what he 'd written .
 - None of the above choices .
 - He does n't know what the song means .


He was proud of what he 'd written .