Pinksoil,
When we lose the person who was our primary connection in life (then AND now) it takes as long as it takes to work through the loss. The deep sadness and grief you are feeling should not be construed as over-dependence. And the fact that you were in therapy before your loss is a blessing really, because you had someone to call when you experienced this crisis. AND you are able to rely on the therapeutic relationship to sustain you (unreturned phone calls aside). Use that relationship for all you can.
Take care of you.