When you cant work out what is best

Hi,
This is going to be a long story but please bear with me.
Over the past 5 years I have lost everything, relationship, flat, car, career and I'm currently a single parents with 2 ds (6 and 3) living back at home with my mother. Boys father has buggered off back to his birth country and i have no idea where he is. I'm living off my almost non existent savings, no money to rent.
My mother has always been difficult, I can never do any right but I am grateful for her letting us stay. But the situation has become unbearable and I'm not sure how much longer I can stick this out.
The trouble is that my kids are happy, eldest son is in an excellent school, youngest in nursery and they are happy and thriving. We live in an area I probably won't be able to stay in.
I have gone from a dysfunctional childhood to toxic relationships and currently I cant seem to pull myself together, I seem to have lost all direction in life as well as the enthusiasm to sort myself out.
What do I do, stick this out for the boys? Or any bright ideas of what I can do?