Sleep training

Bbyx3
Ugh. Today is the day I put my son in his crib. We've been Co sleeping, as I breast feed and he is screaming his head off. I feel so mean and terrible. At first he was all good and I laid him down and hugged him and he lost it. I comforted him for awhile and then walked away. It's been 25 mins. Does it get easier? I just don't want to be co sleeping by 1 year. Miss being in bed with my s.o. at night. Going to take a shower and hope I come out to a sleeping baby.. 😥😣😴😫😢