Hi, and Welcome to JustAnswer, Thank you for your question,
If your former boyfriend had any smarts, he would not file a police report that you"stole" any of the things you took since he knows that you paid for all of the items.
However, there is no telling and no predicting what a former boyfriend would do, if he did not want you to leave him.
You should take some consolation in the fact that even if he tried to file a police report, the police are used to seeing relationships break up and are also used to seeing that the one that was left behind does a lot of things in order to get revenge against the party who left. In these situations, the police do not take these reports seriously,
If you need clarification, please let me know by pressing the "Reply" button,
Thank you for allowing me to be of service, ANDREA