What should I do about this girl?

Prettykins's picture

What should I do about this girl?

So basically, this girl at school has been acting really weird towards me for about six or seven months. I've known her for nearly four years, we've been in the same class since we joined the school, and we were never really friends- I mean, we didn't mind eachother, but we were in different friendship groups and didn't mix as friends ourselves. But since around November/December, she's been acting really nice towards me. She's like always complimenting me, always asking me if I'm alright, always talking to me about nothing, that kind of thing. I am naturally suspicious, so for a long time I didn't think she was being genuine, and at times I've felt like she's being quite patronising, but she's just acting so NICE that I can't do anything against her. It's really getting on my nerves, as she is really like protective over me, but I don't need protecting! I don't know what she wants with me! I have my own group of friends who I am really close to, I get good grades, I'm settled in the school, so she can't be being nice out of pity, so I don't understand it!
So I've always thought she wasn't being genuinely nice towards me, and my suspicions were confirmed on Thursday. We had to do presentations in RS lesson, choosing our topic from one of the topic lists, and as suicide was on the topic list I chose to do my presentation about suicide. I guess I am pretty sardonic in my writing and talking style, but I don't think I said anything too shocking- everyone knows I am a roman catholic, so I don't think many people would have been surprised when I said I didn't accept suicide unless the person is mentally ill. It's just my opinion. So anyway, after the lesson I went to my locker, and the girl (I'll call her K) was standing near me as she has the locker beside mine. I was just putting my books away when K said "I thought your presentation was really good" so I was like "... Thanks," and my friend E was standing near us and just looked at us. Then, as I was walking home with E, she said to me "You know K said your presentation was really good? Well, on the way back from RS I heard her telling C that she didn't like yours because she thought it was too opinionated," so I was like wtf, I knew she wasn't being genuine to me all along, but what's her game?
Anyway, as me and K are both on the school newspaper team, we're always on facebook talking about it. Today, K sided with my worst enemy against a decision I'd made, (I'm the editor of the newspaper, so you could say I'm in charge) and I responded a little critically, but then said sorry I didn't sleep at all last night, so I'm not in clear judgement. K knows I have chronic insomnia and can hardly sleep at all, and she's always asking me how I am which gets really annoying. So anyway, K sends me an email just now saying (copied and pasted) "Hey Alice x I hope I didn't upset you earlier today xx I'm so sorry you didn't sleep well It must be so awful for you x Were you worrying about exams? xx" and I'm thinking JUST SHUT THE FUCK UP AND STOP BUMLICKING ME!! It's literally so annoying as I know she's not being genuine but I can't work out what she wants from me!! What do you think I should do about it- I just want her to back off a bit and leave me alone- I have my own friends- but I can't hold anything against her as I don't know why she's doing this! What do you think I should do???