Am I Being Selfish?

I am reading what all of you are writing and I feel like it is me talking. I am a single mom of 2 kids right now- I divorced from my husband this last year. I had been seeing a bartender (bad idea) for the last 7 months. I found out last month that I was pregnant. My then boyfriend was very insistent that I have an abortion. He said that it would ruin his life if I had the baby right now. I am very anti-abortion and have been my whole life but he put so much pressure on me that I started to consider it. But then I really thought about it and decided that I couldn’t have an abortion for him because I was the one that had to live with it the rest of my life- and I knew that I couldn’t. So I told him that I was going to have the baby and that I didn’t need him to help at all if it would ruin his life so much. I even offered to have him sign his rights away and not pay any child support. But he said that if he was going to have a child in this world that he insisted on being a part of it’s life.
I already have a split family with my other kids and it is really hard on them. I don’t want him in and out of my child’s and my life. I was willing to try it together or just not at all. He says that this is selfish but I can’t help but feel that way.
We are now broken up and I am three months pregnant. I hope that I am making the right choice to put him out of my child’s and my life. I think that this is what is best but how can you know. He is not the sort of guy that I think is going to change once the baby is born. I loved him and it is hard enough to put him out of my system when I am carrying his child let alone if I have to be around him or talk to him.
Am I being selfish to do this?