6 month old wakes up unless he's latched. How do I stop this? I'm dying, I need to sleep

My firstborn was a horrible sleeper but he did OK once we started co sleeping. It wasn't ideal but I was functional.

New baby is somehow even worse. I literally cannot remember the last time I slept for more than an hour at a time. He is still spitting up at 6 months and he seems to wake up in pain so I guess he has reflux or something. He's gaining weight perfectly fine he's a mega chunk a monk and he's a happy healthy baby otherwise.

My husband cannot console the baby - the baby will literally scream and scream and scream until he can latch. So it's not like we can take shifts and I can get any decent stretch of sleep.

Baby's been eating high cal solids for a bit and it doesn't seem to be helping at all.

What can I do? Refuse to nurse and just bounce him and stretch the times between night nursing? Sounds terrible and like it will be torturous for all of us involved but is that my only option?

I don't know what to do. I've never been in such a dark place like this before and it's 100% from the broken sleep.