Getting 1-year-old to sleep!! HELP

Ja

My son will be 1 on Jan 1st and has yet to sleep a full night. He’s up on average 2-3 times a night, sometimes 4-5, and it can at times take an hour or more to get him back to sleep. He will not go to sleep for my SO no matter how hard we try...but as soon as he sees me he calms down. I’ve tried sleep training, but literally the first 3 minutes into it he makes himself vomit so we just give up right away for obvious reasons. I’ve tried this so many times, but it’s always the same result. I’m breastfeeding, but recently decided I need to start weaning because I’m absolutely exhausted since he uses me as a human pacifier. Nursing is the only way to get him into a deep enough sleep to be able to put him into his crib. I can get him to sleep by rocking but he wakes up as soon as I put him down. I just don’t know what to do anymore. I’ve been up 2 hours, it’s 4 a.m., I’m desperate. Please help 😭