Is she obsessed, READ NOW, HELP PLEASE?

Hello, A little background. Im 14 years old, Im a female. all ya needa know! Ive had this teacher for the last two years and im really good at her subject, like the rest of my class. But she always like, praises me for just finishing my work. She told me once that she loves seeing me walk into her class. Ive seen her literally WATCH me and my friends walk through the school, she was literally staring! A few days ago i was hanging around with my friends and she teaches them also, but she only looked at me and smiled. They were teasing saying, "teachers pet" But i don't act no different to anybody else in the class. Once i finished my work and she just says, " gosh your such a good person". Sometimes she just comes over to me and starts talking about things, school sorta. She told me that i might not be in her class next year and she was quite upset and she like done that thing with her lip, the sad face ha ha!. She always helps me with my work, and before i Just went to but some scrap paper in the bin and when i got back i saw her doing bits of my work and then she winked at me. She always gives me Special achievement stickers, merits. Sometimes after school i walk home, or if im home early from the bus, ill go to the shop for a drink or something and ive seen her drive past, and when she does she smiles at me, but i pretend not to look,lol. She lets me talk to classmates when i want to, not very often because im well behave, but when other pupils talk she disciplines them, but when i do, she usually joins into our conversation or eavesdrops because ive seen her smile when we've spoke about something funny. I don't understand why she treats me different and why she wants all her pupils to be like me. Can anyone understand or relate? Advice or help would be loved:) Thanks, Sorry if its long.!