<human>: So, I recently applied for a job in banking. I went through two interviews and planned to take a 3rd soon. Yesterday I received a call and was officially offered the position pending a background and drug screening (which I'm very confident I'll pass.) I received the offer while at work yesterday and I formally accepted it today.

So, yesterday prior to leaving work at the large retail chain I work at I wanted to inform my boss. I tried to be discreet at first asking "If we could talk before I left." He then prodded, guessed, and poked until he essentially said "So, you're giving your two weeks notice?" At which point I essentially said not yet but soon.

After the situation came to light that I had another job lined up he asked a few more questions and I said where. The immediate response I received for him was upsetting. I received the same response from my coworker which I was expecting because the two of us but heads quite a bit. I wasn't expecting it from my boss though.

It was a very negative response and I was essentially told I would fail and shouldn't give notice yet and keep the job 1 day a week as a fall back. How do I handle this situation or approach my boss to tell him how upsetting this was to hear from him? I don't want to burn bridges or anything and I don't want him to give me a bad recommendation. 

 The job is frustrating at times but I've always liked it for the most part and my current manager and I get along well outside of a work setting and prior to him getting promoted. We were both in the management training program and he got promoted first.

Summarize the given text in a few sentences.
<bot>: Boss told me I'd fail at a new job I've accepted and do not know what to say or how to approach the subject.