Well done! You've done the hard part i totally relate to that feeling around that stage.
My baby never loved a bottle and after 6 months however I found it easier to BF. Remember, it's not BF or nothing. It's BF or formula, which is likely to upset her stomach a bit now, needs washing and sterilising etc. Once you start weaning, the work load piles up, and BF is the easy bit.
By 9 months she'll be on 3 meals a day and BF will only be a 3-5 times a day. At 10 months I was back at work and was not BF in the day anymore, two feeds in the morning, two feeds in the evening, that's it.
And when teething starts, you'll be grateful to have BF, it's an incredibly calming, useful tool.
If you really want to give up BF, then wait another month until she gets the hang of a sippy cup. It will be less stressful than trying to convince her to have a bottle.
I have nothing against formula, the above is simply what I think would be easier, from a practical POV. I personally found it easier once I accepted my baby will just be breastfed.