Of course you're becoming dependent upon the T! That's a good thing and quite normal imo. You go to an expert for expert help, and you depend upon him to help you, to guide you to where you need to go, and to keep you going till you get there. Don't fear it. Especially when dealing with PTSD, the trust issue is huge. Don't second guess your T's role in your healing now, as that might be a hidden way to sabotage progressing (and not covering things that you will eventually need to discuss at least.)

The T will model a good relationship for you. It's important especially if you have poor relationships in the past, such as being dependent upon a parent who then betrays your trust. The T will reestablish the dependent relationship, but show you that not everyone betrays the trust. It will help you survive IRL.