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How to temporarily keep your new relationship a secret
Use different names in your phone.
Chances are, you are going to be texting or calling your new partner. However, if you are trying to keep it secret, you may want to use different names in your phone.
This way, if someone sees a new text pop up on your lock screen, they won't see your partner's real name. The problem with this is that they may ask who this new person you are texting is.