How long did it take for you to stop breastfeeding?

I’m still breast feeding my 14 month old and it’s so hard for me to get her off. I planned on stopping as soon as she turned 1 because I didn’t want her to start biting but here we are, and she’s been biting ever since her teeth came in. This week I really plan on getting her off, and for the most part I think i’m doing ok because yesterday and today she has been drinking out of her cup. Bedtime is a different story though, when it’s time to put her to bed she only wants my milk. As soon as I pick up her cup she starts crying and starts to push it away. Can I have some advice please? How did you get them to stop completely?