Sorry to hear of your loss, it is rough going. I lost my mum 22 years ago and i think i can count on one hand how many times i have seen her/dreamt of her....so it is not alot. My grandmother (mums mum) and i were very close as my mum was no longer around, so our bond grew much stronger. she has been gone 4 years.............and i have had nothing :-(. and she is the person i want to hear from the most, but i know that in time she will come.
I know you dont want to hear it..........but you have to be patient. If you are desperately trying to speak with yuor dad, maybe go and see a meduim, or are specifically holding out for yourself to to see him. either way, you cant control/rush these things. ((((((HUGS))))))