[AC Question]

My boyfriend accidentally sent me his contacts, and now they're integrated with mine, i want to delete the file.

[B. Diddy]

Welcome to Android Central! If you actually imported the contacts into your contacts, then they're part of your contacts now. Try opening the Contacts app, tap Menu, and then Contacts to Display, and see if you can filter out his contacts. Otherwise, you may just have to delete them one by one in the Contacts app.