Is it normal to fantasize about being in a relationship with my science teacher?

He's now 29 years old and married with a child. I've had a crush on him since 9th grade; the day I met my science teacher. He's the best teacher, always would come with a sense of humor with his students and always willing to help those that were struggling in class. I'll be 18 on May. Even though I don't have any classes with him anymore, this is my last year of HS. Then I'll never see him again.

My private journal includes my personal thoughts of what it would be going on dates with him, feelings and fantasies about sharing a life with him. I can't help it but feel some jealousy over his wife. She's not that pretty. I've spied on them a couple times from a distance, watching how happy they are, how they hug, kissed and get in the car. I should've been the one in his life.

I can't get him out of my mind. I love him. Is this normal?

Is it normal to fantasize about being in a relationship with my science teacher?
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