Should I leave my boyfriend if he wants me to get an abortion

Amber • Mommy to a beautiful angel baby👼, and expecting my Rainbow Baby ❤💛💚💙💜😍
We found out I was pregnant and we've been together 1 1/2 (&are engaged)and he already has a 4y/o and wants me to get an abortion. I really dont want to nor do I believe in it. Im torn on what to do.