Gemcoops, whatever you do, don't get pregnant against his wishes and hope he'll love the baby when he sees it.
It worries me that you say you "have nothing without him."
Do you mean financially? If you can't support yourself while single, please don't have a child and become a helpless dependent relying on boyfriends and the government to support you. Get skills for a job that can support you, a baby, and child care.
Do you mean emotionally? If you are that dependent on another person, you are not ready to have children. You need to be the one they can depend on, whether or not you are being emotionally supported.
Why do you love someone who is so hard to talk to and share with? What is so wonderful about a man who won't give you a straight answer about the thing that is most important to you? He doesn't sound mature enough to be a father, either. Remember you need him to be more than a sperm donor and a paycheck -- If he's not gung ho, even if he goes along with it to keep you from leaving, he won't be the father you want for your baby.
I may sound hard -- I'm sorry -- I remember burning up with desire for a child, and I know it's hard to think with your head. I hope you have a happy healthy baby when the time is right, and an adoring daddy to share the joy with.