M.F.
Talk to your doctor about starting whole milk early, but we did when we were in the same situation with my first. My daughter was getting bored with nursing around the same age. She dropped down to 3 nursings instead of 4 by 10 months. At her 9 month check-up, I told her doctor that she wasn't into nursing as much and was fighting me specifically at her 4:30 nursing. She said to follow her cues, but try to nurse at least 3 times daily until 1 year. By 9 months, my daughter was also eating 3 meals daily, drinking water from a sippy cup and eating finger foods after meals and at snacks. At 10 months, her doctor told me I could give her whole milk with meals, which we did and she loved it. By 11 months we had dropped down to 2 nursings daily, because it was such a fight at the 12:30 nursing and she was barely drinking anything. Just after 11 months we stopped nursing totally. She just wasn't interested anymore and I didn't feel we needed to fight about it since she was already drinking plenty of whole milk and eating everything in sight, including Indian food. :-)
When she was nursing still and I would give her a bottle, I gave her 4 oz. each. When we gave her whole milk, it was only at mealtimes and she would drink around 4-6 oz. in a sitting.
Good luck!