If there's a part of you that thinks it might be worth it, I'd say keep going. I know there have been many times with myself and other people I have talked to where just when it felt like things were going nowhere, a huge breakthrough was made. Even if you don'[t continue with that T, it might be worth finding someone off campus, although it would likely not be free.
Also, don't be too quick to write-off college counselling centers. Some of them, I'm sure, are mediocre, but my current T is through my university, and she is the best T I have ever known. She has helped me so much, and with way more than just school issues. I started seeing someone at my school because of the same reasons as you, convenience and cost, but it was one of the best decisions I have ever made.
Let us know what you decide!