I told my dad that my best friend died so I wouldn't have to go to work the next day
Why would you lie about that to get out of work?
I wanted to stay at home and watch a TV series.
Just because you want to sit around and watch TV doesn't justify telling a fib to your dad so you don't have to work. Tell him the truth and take the consequences of your actions.
I can't believe you are not supporting my bad decision.
I'm not supporting your decision because lying is wrong, but it's especially wrong to lie to your dad about your friend dying. If you wanted to take a day off work you should have told him the truth, because lying will only cause him to not trust you.