There is this one girl I like but our personalities are kind of different. We laugh at about the same stuff but anyway I want to know how to get her to like me. First, I'm a little confused on what her actions mean. What I mean by that is that she always opens up when we are texting and saying these cute, random things and how she thinks I'm way prettier than her haha and saying I love u (in a friendly way) but when I see her in real life, she's so shy and is afraid to look me in the eye unless I start talking to her. Second, she is really really nice but she always insults her friends in a playful way and stuff and politely asking them to get them something to eat but not with me. I always offer to get her everything she needs. An example was when me and her and another friend were together, she wanted the salt across the table from her but it was right in front of me. But instead she asked our other friend to get it even though she was far away from it too. I don't think she wants me doing anything for her even though I like too. Third, at a sleepover once, I noticed when she sat next to me on the sofa while we were watching a movie, she seemed a little uneasy/nervous. We also had another friend with us and when she decided to lay down, she grabbed my arm thinking it was our other friends arm so she was like shocked at first but then she had this relieved look on her face and layer back down again holding my arm tighter.
All her actions kind of confuse me but I don't know if she already likes me. If not, I want to know how to get her to like me and maybe if somebody could explain her actions, that would be helpful! Thanks!

She is shy, and unsure of herself, and if you relax, and get to know each other she will be comfortable enough to actually talk to you in person. You don't have to try very hard for someone to like you, they will when they get comfortable.

She is more relaxed through texts or phone, but is a bit shy in person, and that's pretty normal.