Hi S.,
I feel your pain. My sweet little boy did the same thing around 4 months. He just flat out refused to eat when I wasn't there.
2 things really helped us (although it was not an overnight resolution). The first was the bottle. We used Dr Brown's wide neck bottles. There was something about the wideness of the bottle that seemed to be similar to breastfeeding. The other thing was what Megan suggested . . .a piece of cloth that I put between myself and the baby whenever I nursed him. What we used was a lovey (it is a Taggie, if you know what that is, but I am sure that any piece of cloth that is soft would work).
So, I put it near his face when I nursed him and then I actually slept with it to get more of my scent. My little guy also gave my mom the hardest time, but my husband got a lot of it too. Once we started using the Taggie, my mom would hold that near his cheek when she fed him with the bottle.
I hope this helps and your sweet little girl starts taking a bottle soon!
B.