Cosleeping to crib?

Help! My LO is 6.5 months old and we have been cosleeping since he was around 2 months old. I initially didn’t want to, but he was colicky and it was the only way I could sleep. Fast forward to now, I need my bed back and somepart of myself as well (I breastfeed almost exclusively) but he has NO desire to sleep alone. The most I’ve got was one 2 hour stretch but I think that was just some luck. Does anyone have any tips? He just screams and screams and I hate hearing it, it hurts my mama heart:( any advice is appreciated!🩵