Husband is leaving me

We’re coming up on our 5th wedding anniversary, together 8 years total. We have two small kids. I’m a SAHM. I have no family. I’m scared to death. He claims he will help me get a place, help me go to school. Daycare. All of it. I’m just so scared to be a single mom. How can I do it? I know women do it all the time but I don’t feel strong like them. I feel like I’ve failed my kids. I love them to death and will do anything to provide for them. I just feel like a failure. I put all my eggs in one basket with my husband. I was loyal, I stuck by his side through the hard times. Now that he’s going through hard times he doesn’t want to do this. I feel so betrayed.