I bet that this man likes being your teacher. But 26-year-old teachers do not look for girlfriends or boyfriends among their students. They are forbidden by the school and by the law to engage in anything beyond a friendly teacher/student relationship. It's probably hard for you to think he likes you only in this limited non-romantic way but you will have to learn to accept the boundaries that must exist between students and teachers.
I am not telling you that your fantasizing about him is wrong. I am suggesting, however, that you accept the fact that the relationship you may dream about with him can exist only in your fantasies. Sometimes we develop crushes and fantasize about people we know we can never have a real-life relationship with - it's safer than going after a real-life relationship and being rejected.
You might learn some important things about yourself from your crush on this teacher. By identifying the things that you admire in this teacher, you'll see what qualities are important to you when you have opportunities to have romantic relationships with your peers. Please don't expect the boys your age to match up with this teacher in terms of their appeal or their maturity. I would be concerned about your infatuation if your thoughts and fantasies about this man dominate most of your thoughts and you find yourself unable or unwilling to lead a normal 16 year-old's social life.
I know that your feelings are real and intense. I hope that my advice has helped you understand how to put them in perspective. Thanks for writing.