<human>: I'll try to keep this as concise as possible.  I met my fiancée working at a night shift job for a very popular foreign auto manufacturer.  Our relationship has moved rather quickly, but that happens from time to time when you believe you've found the one. I'm 29 and she is 30 with 2 children, 5 and 7.  

Some time down the road, I was let go from the job after 3 years.  I hit absolute rock bottom as it was somewhere I planned on retiring and the reason for my termination was sketchy as hell.  Unfortunately, that job was pretty crucial for our relationship moving as quickly as it did.  I had moved in with her.  We rode to and from work together.  We went to the gym together and, of course, we slept at the same time.

Today, I received the call that I was pushed through for my 3rd and final interview for a logistics company.  The hours are literally the exact opposite of what she works.  We had previously discussed this possibility and, while it scares us, I am confident we will make it until our schedules align once again.  Well, everything was perfect this afternoon between us.  Then I received the call and told her they are bringing me in and I will likely get the job (great referrals, relevant degree and experience).  Her mood changed immediately.  She is obviously happy for me, as I have been unemployed for 3 months now.  But her fears came to life and she broke down.

I tried comforting and reassuring her that we will make it.  This is not our first hurdle.  Trust me when I say, we have been through a lot in a short time.  But there has been no betrayal, cheating or lying...she is absolutely convinced I will find someone else and move on from her.  This is not even a remote possibility to me but she was extremely worried and visibly upset when she left for work.  Does anyone have ANY good advice as to how I can break her from this fear and how we can make this work?

Condense the text into a few key points
<bot>: fiancée and I met at job (night shift).  I was fired and will be likely beginning day shift job soon.  She is very doubtful we will survive this difference.