Sounds like you need to tell your friend to mind her own business "thank you very much for your opinions but what's working for me works just fine"
And then sit down with your partner and discuss if he supports you breastfeeding 100%, specifically in public? And talk about if he feels he needs to bond with baby more and if so how he could do this? (ie by giving a bottle, bathing, caring for baby at certain time of the day).
We did the expressed bottle a day from week 4 to week 7 because 1) i had a fab supply and 2) thought it'd be nice bonding for dp. Turns out he wasn't that fussed after 2 weeks of "bonding" and was doing it for me and turns out I was only doing it for him
So we had that discussion and we stopped giving bottle. I froze surpluss milk for a later date.
Turns out that dd did 'forget' how to take a bottle a few weeks later and we had to get her back on it when I went in to hospital for scheduled day surgery. We succeeded eventually and now she has a couple of bottles twice a week when I do a bit of exercise and we've kept that up from week 12. But I would never express to take a bottle out, that's one of the main benefits of bf'ing - the convenience of it all!
There's been a couple of threads recently about getting baby on bottle early (obviously after bf is established). Most people succeeded and it does give mum a bit of a break if needed; however one MNer succeeded for a short while giving a bottle and then baby realized it was a bottle and refused it later down the line around 5 months, so there is no guarantee she'll always take it.
If it's working for you now, don't change anything- trust your instinct.
As for sleeping on you - you baby, your rules
she's only 6 weeks for ffs! We did this too, she slept on me or dp in the early weeks and I used to put her in cot or Moses basket awake which I think got her used to cot (not necessarily going to sleep in it, just lying in it). Now dd can fall asleep on her own but also, if she wants me, she can fall asleep on me too (like just now for her nap, she's poorly and wanted mummy cuddles to get her off to sleep)
why not, I wanted a nap too!
Sounds like you are doing fab to me 