<human>: Give me the gist of the text in a nutshell

I say "boss" in quotes because she's not exactly my boss, but she is my immediate supervisor. I'm 23, and my friend (about 27) sought me out and asked if I wanted to come work for the company, which she recently started working at only a few months earlier. I did, reluctantly, because it beat sending out cover letters and finding a job on my own.

I started about a month and a half ago. Well, today, I got a job offer from a company on my list of dream jobs, in a separate industry, and I have every intention of taking it. Finally, a company that I can see myself at for the next five years, at least. I couldn't be more excited.

The problem is, how do I break this news to her? The fact that it's a separate industry helps, of course, and she knows that this industry is my passion. But she was my friend first, and my boss second, and she trusted me to come on board, obviously for a longer period of time than just a month. My fear is that she'll completely fly off the handle, because the site I work at is about to undergo a massive re-launch. It also doesn't help matters that I absolutely hate the job and am not the biggest fan of my co-workers.
<bot>: This is my first time quitting a job, which I started a month and a half ago. How do I quit... especially when my boss is my friend?