YOU CAN DO THIS!!! :)
You can definitly make it through this :) I agree with the other girls, get in touch with a county worker and they should be able to help you out and give you advice with everything from housing, to food stamps, and WIC. :) Even those things will make your life so much easier. If you feel like you are not getting much emotional support it has also been nice going and talking to the workers about where to find help, because they usually seem to really care about your situation and understand.
I am a newly single mom as well of two children, a three year old and almost two year old. One of the hardest things I ever did was decide to leave the father of my babies, but it has been such a better life for us already. I know exactly what you mean when you say you cry yourself to sleep every night. It is not fair. But do what you have the power to do to make things easier. Since I have moved on I have been so much happier and so have the kids. The baby does not deserve to have a deadbeat dad around all the time. It can be dangerous for you and the baby.
Also we have only been split up for about a year now, and i am so so so broke, but I would not go back to the situation I was in before for anything. He went out alot while I stayed home with the kids too. We were together over five years, and it did not get better, it just kept getting worse and worse. If you can get out now, I think you will save yourself alot of pain in the future. Dont forget you are not his mom, you are not responsable for saving him or taking care of him, if you try to save him it will not help him, just put you at a disadvantage.
So keep your chin up :) you are going to be a very strong mommy, and your baby is going to be so lucky to have a mom that has gone through all this for him or her. :) It is challenging being a single mom, but it is also very rewarding, and things will get better. :) Hug to you!!! You are not alone!! And you can do this!!! So proud of you!! You and your baby will make a beautiful happy family :)