Baby sleeping with mom

My son is almost 10 months old and sleeps in his crib in our room. Until recently he was waking every 2 hours! He is exclusively breastfed and won’t take a pacifier. 2 weeks ago I decided enough is enough and decided to sleep train. We decided on cry it out as that’s what we did with our other 2. I slept in my daughters room the first night and he slept for 10 hours waking once for a feed around 4:30. Next night, same thing. I decided to move back in the room and as soon as I did he was back up every 2 hours. I’m guessing he is smelling my milk! Is there anything I can do to prevent this? Has anyone else dealt with this?