I have a six month old, too. I am a very social mum, love going to groups, connecting, etc. And I see the same thing every day. THEIR babies sleep for13 hours at night, not a peep. In their own room, in a cot.
We do co-sleep now, at first, DS didn't like it much and I had had two seizures, one before, one after birth, so he slept in his moses basket right next to me.
This changed, now we have transformed the 'nursery' in a HUUUGE family bed, basically three large mattresses wedged together and a I sewed sheets so that there would be no gaps. It is all bed.
I feed to sleep, I stay with him for the first hour or so and just enjoy reading a book, lying there and watching him sleep, then he stirs and I just gently pat his wee nappy bum and he never wakes up fully.
I do try and keep him up most of the day, just two naps now (in the bed, while I again, read a book, look at him, chat on my lap top, etc.
You CAN try and teach him some self soothing, but only for his comfort. With Ds1, I put his cuddly animal in my bra and gave him it to snuggle into and stroke it at every feed. The flat cat is still an important member of the family now that my big boy is 8.
He loved comfort item AND mama and I am planning to do the same with my wee baby soon. That will get him through sleep cycles, but probably no earlier than 9 months or so.
At six months, he will also now only trying solids, but mummy milk is still the most important thing for calories, so... he will be less wakey, he WILL sleep though cycles. And soon, maybe too soon
I am also the only mum in my village who breastfeeds. Accordingto the HV, who sees every child under five. It is isolating.
But you are doing GREAT!