Read the following context and choose the best option to answer the question.
Context: Then again , Alex asked me out in person , but he did n't even give me eye contact . Go figure . Hahahahaha . I do n't know Nick very well , but judging by the fact that he 's friend 's with Jessie ( this girl who works with Kathy ) , I ' m going to say that he 's a little on the immature side . I ca n't be too sure , though since I ' ve only been around him once .
Question: why do you think he 's so immature ?
Options: 
- he is very responsible
 - he acts way too grown up
 - None of the above choices .
 - he is younger than me


he is younger than me