Giallo, I doubt that your teacher would be offended or take it personally if you decided to seek tuition from another...dissapointed, maybe...but he or she is a pro!
That said, remember that this person is (presumably) looking out for your best interests. That's why anyone goes to a teacher in the first place: To teach them what they DON'T KNOW, or what they NEED to know. I don't know you, your teacher, or the situation other than described, but there is at least a chance that they are giving you what you really need, whether you recognize it or not.
If you feel that lessons could or should take a different course or tone, you really should be up front about it with your instructor. Correct me if I am wrong, but I don't recall seeing in your post that you have been up front about what you expect from the lessons. If you have been vocal about it and nothing changed, perhaps a written letter would be a good approach. I may be off base with my assumption, if so I apologize, but remember that teachers aren't mind readers!
Try to be as clear as you can about where you think you are, where you want to be (short term and long term).
Is this teacher using a course of study? Do you know what you will be working on in two weeks, or two months from now?
Ultimately, you may find a better fit with another teacher. It never hurts to look around, you may even have to go through several before you find exactly what you feel you need...you may even choose to study from more than one teacher at a time. A while back I was studying with two bassists and a pianist at the same time! It's great to get different perspectives.
Best of luck in what ever you decide, and in all of your pursuits!
Joe