There are babies who feed every half an hour. If you are breastfeeding, latch her and she wont suckle if she doesn't want. If you're bottle feeding, try to increase in smaller amount
For comfort. Sometimes is their mode of going to sleep. Nursing to sleep. So you are the pacifier. If you do not want to be the pacifier, find other modes to comfort baby.
Sucking is one way they soothe themselves and put themselves to sleep...
Jus do it