I'm going to lie to my dad
Doesn't lying to him get tiring?
It's my life, not dad's! Don't involve yourself with my affairs!
Your relationship with your dad is based on trust, and lying diminishes that trust between you two. Talk to your dad and make sure you are both on the same page about things.
Fuck off
You can get angry with me because you know I am right! You and I both know that lying to your dad is wrong!