I apologize in advance for the lengthy post :P

So there's this girl that I've had my eye on for a while, and earlier in the school year it didn't look like she liked me. I started to give up hope, because I thought I had no chance. That all started to change two weeks ago, when she started doing some things that she hadn't done before. In the cafeteria, she moved her seat from across the table, to next to me. And when our table was making our usual jokes, she would brush up against me and lean on me while laughing. I noticed this, and I thought to myself, "Maybe there's a chance?" I started to pay attention to her more, and yesterday when our group was hanging out watching a movie, she moved her seat from across the room and squeezed her way between me and this other girl, where there was little space. A little later, she asked if she could borrow my phone. I said yes, and she was typing on it for ages, not letting me see what she was doing. When I finally got it back, the icon was on the calendar app, and I noticed that she had put an event for her birthday in my calendar with a note that had a smiley on it. Then I checked my contacts, and to my surprise, she had also put in her phone number!

Something's got me thinking that these are some signs that she's interested in me. Am I wrong in thinking this, or are they obvious signs that she is?