3 year old toddler

So my daughter is 3 years old and I work from home she’s always been with me no one else , and only plays with 1 child in the family. I put her in daycare to interact and play with kids her age cause she be bored at home playing alone & I also don’t have to to teach her abc’s & etc, but it seems that she don’t like it & I never see her play or talk with any other kids , she stands alone and watch me leave looking sad as I walk away when I drop her off (which hurt my feelings) she’s been there almost a month idk if I want to just pull her out and let her stay home (plus daycare is expensive) or give her more to to get used to it.