I think I like my math teacher, but my friends think i'm crazy?! But this is normal right?

Yes baby girl, it's normal for a 13 year old to have a crush on her teacher; I did, he was my science teacher in 7th grade. We all have crushes on someone who is much older than we are, it just shows that you're a normal teenager with a pulse. :) I don't want to burst your bubble but this crush you have will disappear and you'll fall for a nice guy in your age bracket. I'm sure he is amazing, hot, and cute but he is too old for you. You should be thinking about a boy your age that you can click with. You and your teacher have nothing in common, and by the time you are old enough to get married, he'll be a father (if not already) or a grandfather. Don't worry about what your friends say or think about you, wait until there crush appears, you can tease them!