Poor old you. No wonder you feel worn down.
FWIW, my DS had a couple of nightfeeds (10pm, 3am) till about 9mths, then dropped the 3am feed at about 10mths. During the day - at 11mths - he was having a boob at 7am, porridge &/ toast at 8am, formula milk from a beaker at 10am (I was working), lunch at 12, boob at 3pm (when I got home), solid tea at 5pm, and bedtime boob at 7pm. With meals he drank water from beakers.
If you child is having similar amounts of food/drinks during the day, I don't think it is unreasonable to expect her to go through the night from 10/11pm till 6/7am, and give you some sleep. Having said that, I didn't co-sleep; DS was in a cot in our room, and moved into his room at 4-5mths. Other posters who know more about "weaning" from co-sleeping might be able to offer you more practical advice. I know some mums do co-sleep until their kids are 2, 3 +, but others knock it on the head at about 5-6mths, when it is more likely that the child will be able to go for longer periods at night with free access to milk. There is a school of thought too that stopping co-sleeping around this age makes it easier to get the child to sleep in his/her own cot.
Am sure someone with more experience of cosleeping will be along soon.
However, in my (humble)opinion, I wouldn't beat yourself up for moving your DD to a separate cot/room because you have given her an excellent start, can still continue breastfeeding during the day, and - at the end of the day - have to have some rest yourself, as well as some private space & time with your DH.
Good luck.