Nameste - I wish I had some words of wisdom for you. I can relate to those bad eating patterns from before. I regularly would skip breakfast, sometimes lunch and then would eat horrible for dinner. My biggest downfall was eating out. I did it literally 7-10 times a week. And I never made good choices even when I was on my own plan before joining MRC.
I'm the opposite of an emotional eater. When I'm depressed or down, I don't eat. I actually went three days with nothing but Coke Zero several months ago. Of course, the minute I ate again it was something terrible (probably McDonald's).
I fear going off the plan so badly that I actually obsess about my food. I sit here and watch my boss, who doesn't have that much to lose, eat 2 burritos last week and be inconsistent with his HNS's and supplements and STILL lose 4 lbs while I only had a single tortilla chip dipped in cheese and I lost 1/2 a lb.
It's all about training yourself and keeping yourself on a routine. It's hard and it's easy to slip but just try and look at how far you have come. 70 lbs! That's a whole person (albeit a young one). Try just focusing on one thing at a time. Make it a priority to eat breakfast every day. One of the things I do is try and prepare my breakfast early. I've really fallen for the cottage cheese with lemon chiffon pudding mix so I make it up at night and put it in a ziploc container so I can grab it on my way out the door. Or I'll boil up some eggs and have them peeled and ready to grab. And I try to make sure I have some meal replacement bars handy just in case I'm really running late (LOVE the caramel peanut ones, btw).
You can do this!