My boyfriend checked my hotel records.

First of all, ordinary police have no right to inquire about personal communication records, room opening information, residential address, etc. Except for cases involving related crimes.

Secondly, your boyfriend is a police assistant, belonging to the auxiliary police team and has no administrative law enforcement power. It must carry out various tasks under the leadership of the police. The tasks that need to be completed according to law can only be completed by the police in the team, and police cooperation only plays an auxiliary role. Legally speaking, the police have only rights, but no power, which is no different from the rights enjoyed by ordinary citizens.

So your boyfriend's behavior is illegal.