How can I stop my iPhone calls from being tracked?

• Change your Password on your Apple Account.
• Are you sharing a cellular plan with him where he is the account owner. That would give him access to all your call logs from your cellular provider.
• Your phone is not being remotely accessed through any hack
• Provide more details for any specific recommendations.

In addition to the excellent advice offered here, there is another option.

Open Settings.

Tap Privacy & Security.

Tap Safety Check.

Now look at the available options.

Good luck! 👋🏼😉

And does your BF have your Apple ID and Password?

your device is not hacked. What makes you think that it is?