Hi! My son was exclusively breastfed also. I got him to start drinking just water from a straw cup(I tried every type of cup out there and that's the one he went with), he was still breastfeeding. As he got better at drinking with the cup and he started increasing his solids, he gradually started nursing less and less and eventually weaned himself. He wouldn't drink cow milk because of course mommy milk tastes so much better, so I slowly added cow milk to his water little more each day until it was all just milk. Be patient, it'll take a few months for complete weaning, when she's down to just nursing once a day, you'll have to use distraction so she'll "forget" to nurse, then one day she actually will. Also, during his weaning period, I fed him his meal first, then let him nurse after, and would start skipping the nursing after some meals.