I don't want to support my pregnant friend any longer.
Why don't you want to support her?
For the past six months, I have been slaving away so much for her. I have been paying her hospital bills and to top it all off, she doesn't seem to care about me at all.
It sounds that you have been doing a lot for your friend and it's understandable that you are feeling overwhelmed. Your friend may not have realized all that you have done for her. Rather than cut off all support in the midst of your friend's pregnancy, try to raise the matter with her that you are feeling overwhelmed with all of the things that you are doing for her and your friend will be more accommodating.
Yeah I don't think that will work. I know that she doesn't care as much as I do. I don't want to be responsible for the baby when it's born as well.
You have a lot on your shoulders, she is not treating you well enough. You are stressed and need some comforting, I feel you are very overwhelmed now. Take it slowly but eventually stop supporting her if she seems not to care.