my DD is the same, during the day she will only be held by me no one else, in the last few weeks I have been able to get her to sleep on her own, well not really on her own, I feed her to sleep or lay in bed with her. I've totally given up on the cot cause she just will not settle and cries hysterically as soon as she realises I am gone.
So our solution has been to put a single bed next to our bed and she sleeps on it, I feed her to sleep then roll off so I don't have to disturb her.

I have 4 slings which I could not be without.
As she is getting older she is getting better, she is slowly staying on the floor more by herself and will let DH hold her for 10 or so mins sometimes.
So yep it will get better when she is ready and feels safe she will let you go a bit more.
It is so hard though some days I wish she would just go to DH for more than 5 mins but since she has been sleeping so much better on the single bed it doesn't seem to bad during the days.