Cry it out method for 13mo?

Just wanna get you ladies advice because at the moment I'm completely burned out and looking for any kind of help.

Background info..

I'm a sahm, and I've been exclusively bf and cosleeping with my boy since birth. Kind of took the whole attachment parenting approach but somewhere along the way it turned into him constantly pulling at me for milk night and day, I always give in because idk why first time mom and idk any better. 3 weeks ago I made the decision to cut him off the night feeds in hopes of him sleeping through the night and that's been hard obviously too. Today I tried to do the cry it out method for his nap,in his own room, I went in every 10 min for 2hrs and comforted and laid him back down explaining also that I'll here when he wakes up.. In the end he fell asleep with me on the side of his bed.

I did not feel comfortable with this method before but at 13mo he gave me the impression that he can handle this. He's been sleeping alone for naps since 9mo just having my boobs tho.

Am I doing the right thing here?