@
AshPhoenix, your dad is just like every other dad in the world who hasn't given any thought whatsoever to the fact that you are not him.
He is encouraging you to be outgoing and mix with people because THAT WORKED FOR HIM, SO OF COURSE IT WILL WORK FOR YOU. He probably tried a lot of ways to be an adult when he was a teen, and the one that he is forcing on you is the ONE WAY that worked for him.
Just tell him what @
Poptart told you. You might have to repeat yourself, because it wasn't so long ago that he was changing your diapers and it's hard for a dad to understand that time passes. Particularly a non-intuitive dad.
If things get too bad, you might have to move out. Check your options.