Hi G.,
I think she might like the independence of a bottle and being able to play at the same time. I think you did great lasting as long as you did. One thing you might try to do, right now, is to try transitioning in the sippy cup in place of breast-feeding. My 14 mo old just fully transitioned to a sippy cup over this last weekend, and it only took me 2 weeks to do. She's been on whole milk only since the weekend after she turned 12 months, and she's doing great. At this stage, she only drinks (and needs) only about 16-18 oz of milk per day, and she eats table foods great, so I think your little one is just ready for the transition.
I know it's sad when that closeness is gone from breast feeding. My little one won't even let me hold her while she drinks her milk! In fact, she rarely lets me hold her. She just wants to be on the ground playing. That's just how it goes. They want a little independence, and we gotta give.
Hope all goes well with you.
Good Luck!
Mari