I don't know what to do..

So I still haven't told my boyfriend I'm pregnant.. We've only been together since May and were not trying but life had a different plan for us. We kinda talked about it and he said he isn't ready for another child. Back story: he was engaged until January of this year, him and his ex fiancé were expecting a child in January as well but I'm September found out that the baby had serious serious health issues and probably wouldn't carry to term and if he did that he wouldn't live very long after birth. They decided to basically abort the baby. 
I understand where he is coming from but I don't know how much longer I can not tell him and abortion/adoption are just not an option to me. I feel bad for saying that I would chose my child over him, but I would. Does anyone have advice on how to tell him? I'm currently 9 weeks and 2 days..