How to accept you’re a single mom

Never in a million years would I have ever imagined myself as a single mom. My bf of 4 years just moved in to his new house we have a 10 month old and I feel like a complete failure. I don’t know how to stop crying. It was both of our faults for splitting up, I feel/know it was more my fault than his. I cry when I see my baby’s face, I let my baby down. His father was the man I thought I was going to spend the rest of my life with. I cry for everything. Idk how to accept it. I’m embarrassed to tell anyone friends or family. I’ve just been home all day everyday for idk how many days now I leave the house just so baby won’t be so bored but I just want to be home. Idk how to do this. How do I accept it? How do I stop crying? How do I accept we will no longer be a family?