Heartbroken.. :(

I am pregnant, been with the same guy for 5 years, found out just last month that he was "dating" another girl for 6 months got her pregnant, then yesterday my friend gets a message from some girl and she was dating him to apperently for a year also pregnant. I'm sick to my stomach he's so abusive verbally and used to be physically. He messes with me so hard then tells people I'm crazy :( he hid it from his parents that I was pregnant and they where under the impression he hasent talked to me in a few years.. I'm so insulted. And to top it of this girls are so disgusting ... I can't even not that matters but I don't understand. I don't know what to do I don't think it's right bringing a child into this world I love this baby enough that I don't want to bring it into a world of negativity and where he or she is unwanted. Thoughts please no negativity I have been throwing up crying sick just need advice I'm hurt...