Would you leave over this??

Just found out I’m 6 weeks pregnant and already have a 6 month old son. I discussed adoption for the second one because we aren’t prepared for a second baby. And my SO then slightly raised his voice and said we should put our 6 month old up for adoption with his sibling when they’re born. He was very insensitive in the way he said it and made me cry while giving my 6 month old a bottle then didn’t even apologize and just started playing games on his Nintendo. He’s mentioned putting our son up a few times and it tears me apart every time. Would you leave the relationship? I’ve considered leaving but I’m scared to raise our son on my own. I have no support system from family where I live. And would have to move cross country to be near family that would support me.