To offer advice on the decision whether or not to take the long term but these are my thoughts...
Find a living situation much nearer the school. Ask staff, maybe rent a room from someone. You don't have to officially move. The drive alone would kill me in one way or another.
Do not express any of your feelings to anyone within your professional life.
Chances are the principal articipated someone resigning who instead made a smarter choice to be out on leave. Hold your head high. Shine. This is the panning out. Make this, each day teaching, the day. There will be reward for you in the future
This principal probably is embarrassed at what has happened but bottom line, she needed a teacher.
Congrats on the job, all will be great. Again, seriously find a closer living situation for M thru Fri
Even a motorhome would be better than 10 hours drive time per week.
