i breastfed my daughter 'til she was 1, and i will breastfeed my next child as long as they want.
i had major problems with recurring thrush, and too much milk, but my baby refused to take a bottle of expressed milk!
i am so proud of myself that i persevered, but i had a lot of support from my hv (a bf councillor), my family, my partner, and a bf support group. this made a world of difference.
i often found i was the only bf mum at groups as well.
personally, and this in no way is my opinion OF bottlefeeders, but to me it would be a very unnatural thing to do.