I sort of guessed he was finished feeding because he was falling asleep otherwise he would have continued to actively feed. This guessing game only lasted about 5 days though because once the association had been broken he would just unlatch himself when he was done.
When we first started the training he would get upset and pull himself up as soon as I left the room so I would leave him for a minute and then go back into him. I wouldn't make any eye contact and would just lie him back down whilst gently but firmly saying, "its bedtime (insert name). When I left he would get up again but then I wold leave it 2 minutes before going back into him and would repeat the above. The intervals would then be 4 minutes and then 8 minutes. He was never left longer than 8 minutes but it felt like a lifetime sometimes!
The first night took him about 50 minutes to go to sleep and then with each subsequent night that time lessened until by day 5 he would just stay lying down and gurgle to himself in the cot when I left the room and he would usually be asleep within ten minutes.
If at any point he woke during the night I would follow the same routine as above of the 12,4,8 minute intervals of going into his room and just lying him down.
This routine was also followed for nap times.
I can completely understand your concerns about your DS not tolerating stories etc because of his age.
When addressing sleep issues what worked well for my 10 month old will in a lot of ways need to be altered to suit a 13 month old for reasons like the one you gave.
My Sleep Consultant made a very detailed plan and routine to tailor to my son's individual needs (including being age appropriate) and the problems I was having, it wasn't just generic advice she was giving me if you know what I mean. If you were to contact her she would come up with a plan specific to your DS's age and to address the individual problems you are having.
People hear the words sleep training and sleep consultants and wrongly assume it's all about leaving babies to cry when it's so much more than that. The fact our phone call consultation was over 2 hours long just shows how complex an issue it can be and how professional a service it is.
A lot of people confuse CC with CIO which is why they are so against the idea.
With me she discussed the 5 or 6 methods of sleep training she deals with and so then you would tell which one you prefer and then she tailors a plan to suit yours and DS's needs.
I don't know how bad things are for you at home, but for me my life was near unbearable. I was getting about 4 hours of broken sleep a night, I was exhausted, tearful most days, I dreaded the days with DS because he was so tired and irritable and I knew he'd never nap and I would dread the nights too. I stopped enjoying him. I was fighting with DH all the time too because we were both exhausted and stressed. We'd tried various solutions ourselves but we couldn't see the woods for the trees and we didn't really have a clue if what we were doing was helping it just making things worse. I told DH that I just couldn't cope anymore and that's when we looked into getting the advice of a Sleep Consultant.
Those first few nights of implementing the new bedtime routine were difficult and doing the CC was hard at first but the difference it made to our lives, and the difference it made to DS, was unbelievable. It only took 5 days in total to achieve a wonderfully sleeping child which was nothing really when compared to the months if sleepless hell I'd already endured and the months of sleepless hell that would have lay ahead if we hadn't have done something.
As I've said, the advice she gave me was fantastic and it changed our lives for the better. I understand that CC isn't for you but there are so many other options available and other ways to improve your DS's sleep so do consider speaking to a Sleep Consultant if things do get intolerable.