Agree fortyplus. I was one of those mums who thought I ought to set a routine and space out feeds etc. That only made my dd and consequently me, miserable. In my case, I had the non-routinised vocal (avoiding the word "difficult" lol) baby first. My second is not much better but what I have learnt to not to fret about routines and just enjoy baby and the flexibility. It is only for a very short time .
Shish, I am also a bf-ing mum. It is perfectly fine to encourage your ds into a routine now, if that is what you prefer. Your ds is at the age when he will start to settle down anyway.
But I just wanted to say that even without trying very much at all, dd did settle into a routine by herself. It wasn't through her feeds because for bf-ed babies, as fortyplus says, they nurse as much for comfort as for food, in fact more for the former as they get older (eg, even at 17 months, dd could nurse as often as once an hour when we were at home, but v. short feeds).
What happened was that I noticed dd would only get tired at certain times of the day (eg if I took her out in the buggy outside of these times, she would not fall asleep whereas she would previously). So the routine was built around her sleep times.
To encourage a routine, observe when your ds gets sleepy and then have a set wake up time, bedtime and for naptimes, take him out in buggy or nurse down. I would bother too much about spacing feeds, since it just involves hoiking up your top and your ds should be quite an efficient feeder by now.
All the best. BTW, Can't advise on bottles because dd refused bottles when I tried to introduce them in the early days, hoping to get her into a routine.