<human>: Can you give me the gist of the text in a nutshell?

Hi guys. It seems like a really small matter and I feel a little stupid asking an advice about this. But I decided to give it a go:)

So I started university this semester. I'm studying a combined set of 3 main courses - and naturally we're a very small group that does this certain degree. One of them I obviously only met at uni, and I think she's way too clingy/depended on me and I'm getting slightly irritated.

It shows in the little things, but it shows: whenever I go sit somewhere, she HAS to sit next to me, and if I go somewhere she asks me where; when I type/do something on my laptop or even my phone she has to look what I'm doing or ask something and comment about it (which feels a little invasive); we also went out all the students to celebrate another classmate's birthday, and she was very determined to order exactly what I ordered ( I debated wheather to order a meal or just coffee, and she was like "no, don't leave me alone!"... you can order whatever you like, you don't need me for that...). 
Things like that. She has an issue with a classmate that hangs with us a lot, and constantly tells me about all the things that piss her off about her, often via texts and calls that just last forever. I'm a pretty private person and I like my personal space, and the whole situation bugs me a lot. Am I overreacting and being needlessly judgemental? She is a very nice girl though and I would like to keep a good relationship especially when the class is so small, plus she doesn't deserve getting hurt or feeling unwanted... but in the other hand her dependence can get really uncomfortable for me.
Any advice?
<bot>: a classmate is clingy and dependent, its a small class and its hard to find a way to get away from her. How do i deal with that? She always follows me around.