I just need reassurance I'm not ruining my son?

I've posted on here a few times recently that my son has been struggling with sleep the past few months. Everyone i meet keeps telling me how magical CIO is. I will never ever do it. Ever. But he really will start sleeping better again, right? I'm not messing up because I respond to him, snuggle him back to sleep, occasionally cosleep and still exclusively contact nap at 15 months? He will learn to sleep, fall asleep, fall back to sleep etc eventually?

He just wants to be close to me right now and it's exhausting but I also feel very honored to be his safe space. We had our last nursing session last night and maybe I'm just hormonal and sad and exhausted but the opinions around sleep specifically just get to me.