5. Your partner has trust issues.
Trust is the foundation of a healthy relationship. And how easy you find it to trust someone is greatly affected by your past experiences. So if your partner thinks that you’re lying to them, most likely they’ve been lied to or cheated on in the past.
After such a bad experience, a person usually becomes hypersensitive and any innocent gesture or word said by you can raise the alarm in their mind. In this case, your slightly-paranoid partner should understand that their snooping is connected to their own issues and not to your actions.