Father doesn't want the baby

Hi all! I had a positive pregnancy test on Nov 16... I should be around 5 weeks along. I have a question for all of you. The father of my baby doesn't want me to have the child. We share a 5 year old girl, but divorced almost two years ago and raising her between two homes has been difficult. He says it's a terrible idea to bring another child into the mix. Yes, it isn't ideal, but I'm 27 and I feel emotionally ready for this baby. Any thoughts?