It can be hard to stop breastfeeding. There is a bond there that sometimes moms are afraid they will not find anywhere else. Often it is more difficult for the mom to stop breastfeeding than it is for the child. Sounds like this may be the case. I'm not saying you should stop, just not at work.
I think you have gotten used to this and want it to continue, telling yourself that your daughter needs this bfing and cuddle time because it's what she knows, when in reality your daughter will be just fine
You will miss it. But it happens. Kids grow. I miss my kids being babies so much! But you will find other ways to bond her. When you get home from work you will have a new cuddle time together because you haven't seen her all day and that will be just as special.