I have a crush on my head teacher?

I get ual desires for my head teacher all the time. I'm 15 years old, so I should have grown out of this by now. I think it all started about a month back, when I was called into his office. He congratulated me on my results in a recent exam. After leaving his office, it just hit me how amazing he actually was. However, he is around 50 years old, but he has a lovely personality. Just last week, I over heard him talking to another teacher about his upcoming wedding anniversary. I was so upset and broken hearted. I just want to live with him. I think this is affecting my grades as well, I just sit in cl and stare out the window..thinking about how much I want to live with him. Sometimes I get erflies when I walk past him and in embly I usually stare into his eyes. I get dirty thoughts all the time, which make me feel silly and immature. I cannot help this by any means, I am truly in love with him. Do you think he likes me back? He smiles at me when he walks past me in the corridors. I spoke to my mum and she was actually very happy for me, she fell in love with a teacher at high school and 5 years later she gave birth to me! Help me?