Now having sort of figured out imperial measures (you)to metric (me)

I tend to think that yes, your weight is fine but as a young woman you would feel better at around the 110-115lbs. One thing you should consider though is that muscle weighs more than fat & if you have gained muscle (lifting kids & groceries, housework etc)some of your weight - not all - just some - may be muscle so you may need to accpet being abit over 110. Also you have to be careful not to get so hung up on 110 that you become obsessive again - I mean 112 is fine!!!!
i think that you are planning to do the right thing by going to college.

if for any reason you can't do that then find something to do as an interest, actually as I type that i'm thinking you should start

doing something to re-activate your brain to study: - research family tree? Write stories/poetry? Maybe do some reading on the topics you're interested in studying?

that would help you prepare for college & at the same time help get you out of the down mood & give you something other than food & feelings of "what if" to think about.

the cbt might also help you long term with feelings like these that push you toward anorexia.
So, what & how much do you eat in an average day & at what times?

? Do you do what many mums do>>> eat food left over by kids or that kids ask for then fall asleep or decide they don't want it after all? Very easy to do, but a bad habit & one that will gain weight.
You know you have a great husband, i'm sure equally great girls & I bet you tell them all that they're wonderful & loved etc alot but I wonder if you are able to say the same about & to yourself?

? You need to learn how.
Thing is what do you want: anorexia, illhealth & depression or health, happiness & growth (personal not weight!!)