I think so....I'm 40 and I've had a number of psychiatrists over my lifetime. Each one has a different approach, and they change as do you. At a certain point in time, you reach that plateau where neither of you is doing anything for the other.
Besides, if you feel that you aren't getting anywhere, go for a change. It's supposed to be beneficial, and only you can decide if you are getting something out of it.
The relationship between patient and doctor is quite sensitive. There is intense trust issues and informing them that you are moving on can be done in private, or through a letter. I've been informed by my doctor that he was letting me go...and I was aghast...I felt completely betrayed. But, having met my new doctor, I"m really glad that he did. Frankly, it was for the best as I didn't realize just how useless my old one was.
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Meddle not in the affairs of dragons, for you are crunchy and taste good with ketchup.