Boyfriend wants an abortion..

So my boyfriend of two years and I just found out we were pregnant.. about 6 weeks. I have a son from a previous relationship and he has two from his previous. Anyway, we always talked about having our own one day and even picked out names, what he/she would look like.. all that fun stuff. He told me "I'm sure once we move in together, you'll be pregnant in no time." Well, after my lease was up and he sold his home, we got a two bedroom apartment.. not as big but enough to save for a home in the future together. We are now pregnant and he instantly says.. its too soon! my children will hate me! were not having this damn baby! what's wrong with you? you want TWO fatherless children?.... all of this is so out of character for him and kills me inside. I eventually broke down and said I will get an abortion but after days and days of tears and depression (I've had two in the past and told him I couldnt handle another) I decieded I'm going to keep the baby. Well, I just told him 30 minutes ago and he said "why are you doing this to me? I don't want this baby!" so I said, Well, I do. I already love this baby and I'm keeping it. so long story short, he told me to leave and here I sit at my moms house crying. any advice, comfort or reality checks?! I'm all ears. Btw, not that it matters but I am 24 and he is 34. My son is 7 and his is 6 and 4. He is also worried what his children's mom would think. so ridiculous