Is this weird? Please answer !

First off it's completely cool if you have a crush on an older person. That's so normal. And if you are a girl who likes a girl you might be a lesbian. Which is confusing I know. But a lot of people are and that is ok. A question to ask yourself is have you had a crush on another girl? Because if you just llike this one teacher you might not be gay at all, a lot of people have a crush on someone of the same gender without being gay. Another question to ask yourself is have you ever liked a boy? You might be bisexual to.wich means you like both genders.
I hope this helped you :)