White woman with Muslim man& unmarried

So my BF is Muslim. And we got pregnant miraculously even though we use protection , but one day it broke. So I'm pregnant. And he was telling me I must have an abortion. Which I denied. I had a miscarriage last year with my x and I would never just kill my baby. 
So now we have to get married before we tell his parents. 
But my thing is , if he was having sex before marriage. Why is he freaking out now that I'm pregnant and not married ? It really makes me angry. That he would tell me to abort my baby because of his religion. I'm not Muslim. I don't follow religion closely. And your already sinning by having sex with me. It's been causing us a lot of stress. Anyone else in the same boat ?