Answer:
standoffish and uneasy
Step-by-step explanation:
Peter arrives at the annex without his parents and meets a family who doesn't know anyone. Furthermore, we can infer that he may be nervous about whether his parents will be able to reach the attachment without being caught. Thus, the environment to which he is inserted is very tense for him, which justifies him to be distant and restless when he arrives at the annex. Peter probably had a lot on his mind, a lot of conflicting thoughts and couldn't speak to anyone.