My co-founder and best friend quit his great Facebook job and poured his life into this startup for 4 years. He still believes in what we do and will be devastated if I quit. I'm torn!
Plus, I'm not really sure why this guy thinks I'll make a good VC! What if I hate the job and myself for taking it and letting so many people down?
Have you not talked to your co-founder yet? That seems like an important thing to do before you make your decision. I understand that you may think he is so invested in the company that he will see you considering the offer as a betrayal, but tough decisions like this are exactly the kind of thing you should talk over with your co-founder and best friend. If you accept the offer without talking it over with him, he will very likely see it as a betrayal. Perhaps he will see an upside to having a best friend who is a VC? Give him a chance to make his own reactions. No matter what road you choose to take, you will be happier in the end if you keep your best friend.
Plus, I'm not really sure why this guy thinks I'll make a good VC! What if I hate the job and myself for taking it and letting so many people down?