HELP!!!

I found out I was pregnant about a week ago. I told my “special friend” and his reaction was; this wasn’t supposed to happen have an abortion. I explained to him that I do not believe it is my choice to end the pregnancy and I will not put myself through the emotional trauma. He keeps saying that we were supposed to go no where. Well I made a dr. appointment to have an ultrasound and he suprisingly went with me. And now he is refusing to talk about the situation but wants to go to appointments and be involved in making the decision. Well I have had three children 9 (parenting) 8 (adoption) 5 (parenting). I do not think I can handle another child alone right now and his actions and classification of our relationship show that there is a good chance no matter what he says when it comes to it I will be doing it alone. But he does not like the idea of adoption because he doesnt want a baby to think he just didnt want it. Well I know that the couple that adopted my son would love to have another baby and I would love to give him the gift of a sibling. I don’t know what to do! He sees no reason to make any choices at this time (his words). I explained that it does need to be decided in advance for planning purposes. If he does not want adoption it will cause emotional trauma to all parties and if I keep the baby I will be toughing out being a single mother of three so he can save face. Any suggestions on what I can do or say to him to get communication going? Thank you!