Here is a great article (though lengthy) on creating a secure attachment with your baby.
http://psychcentral.com/lib/five-ways-to-create-a-secure-attachment-with-your-baby-without-sharing-your-bed/
One key takeaway I got from it is that attachment does not necessarily means constant togetherness. The important point is that the baby has a regular caregiver in the first six months of his/her life, as that is the period they seek security. The lack of a constant figure may create unnecessary stress for the baby.
For now, continue to shower your baby with love, care and attention whenever you can. Soothe her when she fusses and breastfeed her after work. Breastfeeding is the best bonding time for mother and baby.
It is really great that your baby has a doting grandmother whom she is comfortable with. You can still bond with your daughter and be there for her when she needs comforting.
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