She won't let go of my Boob at night and I'm tired

No matter what time my daughter wakes up she's attached to my Boob and won't let go. I'm tired, for two hours straight she's been attached to me and won't sleep any other way. I really want to stop breastfeeding cos I am to the point of almost crying cos I'm so tired. My daughter is almost, 11 months. It's been bad for a long time but never this bad. I understand it can be for comfort, but some nights I'm woken up every hour and 9/10 she wants to "feed".

I wanted to go untill she was one. I just can't bear it anymore plus she's started biting also, I dread breast feeding every single night when she's falls asleep on me. Does anyone have any tips for getting her onto the next stage (e. G. Formula)? Or how I can curb these bad habits she has?