Basically what you're describing...you can't do. There is no move-to-England-to-live-with-my-friend-and-work-in-dad's-shop visa.
But maybe if you describe your situation a bit better, we might be able to find a legal path.
- How old are you and what are all the citizenships you hold?
- Were your parents or grandparents born in any European (EU/EEA/CH) country?
- Are you still in school? If you are a recent graduate, how long have you been out?
- Do you hold any degrees? If so, in what?
- Are you interested in studying for another degree?
- What type of work does your friend's dad do? What would you be doing there?
- So, this friend. Is it strictly buddies or is there any potential for romantic involvement? Be honest; it's important.
- What nationality is your friend and/or his/her family?
It's complicated, and please don't think you can just *move* to the UK. You can't just do that, even if you're from the US. We just need to find the right legal path (if any) for you to follow. Just be aware that there's a strong chance you might not be able to make it happen given your present circumstances.