Why does my teacher ignore me?

Well here's my problem: I have a teacher in school, that is very nice, pretty, and caring etc. In the beginning of the school year, she would give me a lot of attention. She would always call me mature, and it would make me feel good. I even went out to lunch with her during the Christmas vacation. Before the vacation she told me to call her to see how I'm doing, and all. I would sometimes think that she was my mother, because of how she treated me. We were pretty close.

Now it's very different from the beginning of the school year. Whenever I talk to her it would look like she doesn't care about what I say. She would sometimes ignore me when I say something to the class, it would make me feel disappointed. But she does look at me all the time, in a weird way. Especially when I'm talking to my brother during class (he is in the same class as me) or anywhere. Now there's a kid in my class: not smart, addicted to minecraft, overweight, short, annoying, nerdy, and a pretty ugly looking kid. She gives him all the attention, I don't know why. She helps him out with everything, she laughs at his jokes a lot, she talks about him a lot, and is always near him. I don't know if she has a strong connection to him, or if she's trying to help him, because he has a lot of problems. It's starting to make me jealous, and I'm starting to get depressed, because I really like her. It's really affecting my life, and my education.

Please CAN SOMEBODY Help ME WITH MY PROBLEM!

I'm also called a good looking person by people in class.

Teachers sometimes take a student "under their wing", when they are having problems fitting in, problems with their studies, etc. It's not that she is ignoring you, it's just that she was there for you when you needed a friend, and now there's another student who will benefit from her extra attention. It's like parenting - parents always have a favourite child - it's the one who need's them the most at that particular time in their life!

Teachers also can't truly be "friends" with their students, as they need to maintain some level of separation in order to maintain their respect and fairness with the rest of their students. In some situations, having lunch with or getting together with one student outside of class would not be appropriate and could raise concerns of faculty and parents. I'm not saying that this is the case - only that it can be misconstrued.