Hey girl. Sometimes all you can do is pray. I too have been abandoned/betrayed by my baby's father, he was and still is the love of my life. But I still have 4 1/2 months until my baby boy is brought into this world, and I will keep praying that something will change, and that he will come around. If you know in your heart that you cannot get an abortion, don't do it. I've personally never had one, but have heard so many stories of girls who wish they hadn't. If you want to be a mommy to your baby, then you can do it. Of course it won't be the easiest if the father is still behaving so badly toward you once the baby arrives, but you'll love that baby so much you won't know what you did without him/her. And if you don't think you can be a mother yet, then there is absolutely nothing wrong with adoption. You can even pick the parents yourself, and keep it open if you would like to know what's going on in your child's life!
As for your question about financial things, well there are people/places that can help. I'm not sure how things are at your home in New Zealand, but in the United States there are all sorts of programs that help young mothers, from WIC (Women, Infants, and Children) to the Healthy Start Program, as well as numerous state and locally funded programs. If you decide to keep your baby, do some research, find out what is available to you, and get what you can! These programs are designed to help you get on your feet so that you can get out on your own and provide for yourself and your child. And no matter what happens with the father of the baby, don't you think for one minute that he can just run away and forget it all. You make sure you get child support. Good luck, and get at me if you ever want to talk.