You're welcome.
I just hate to think of you fretting over something that's not worth fretting over.
Is your DS happy, alert, shiny-eyed, damp nose (oh, no, hang on, that's cocker spaniels) - if he's a lively chap, he's fine.
Also, once they get to this age, they start realising they can choose to do things - or rather, they realise that there are some things they prefer to do (ie nuzzle up to their mums for a milky cuddle) and some things they aren't as keen on (ie stopping nuzzling up to their mums for milky cuddles).
And they're more easily distracted too, so sometimes they'll begin to feed less during the day (because there are Important Things to look at - DS1 used to get transfixed by my arm or a bit of wall, DS2 was very distracted if I wore tops with patterns on them) - breastfeeding's something where you meet new challenges along the way as your child grows and your relationship develops.
It's lovely though - I'm glad you're continuing. It's worth it