<human>: Can you condense the text into a few key points?

Okay so let's start with a bit of backstory.

  I'm a senior in high school and one of my friends said one of her friends seemed interested in me an gave me her number. I said why not and started texting the girl. Things seemed to be going well, an we went on two dates that went very well by my standards.
   
  Now here is the problem. We don't have any classes, so we don't get to see each other very often. Her locker is near mine, but she is almost always talking to her friends that i don't really know, an I don't feel like it's right for me to intrude. These aren't necessarily huge issues, but she is also involved in alot of extracurriculars such as debate, so I haven't been able to go on a date with her in about two and a half weeks. 
    But we both have phones right, so no worries? Not exactly. I seem to always have to be the one to text her first. I tried an experiment and went four days without sending her a message, and I didn't get a single one from her. And then sometimes we will be in the middle of a conversation an she will just read my message and not reply. For hours. Until I text her again the next day and she acts like nothing happened.
      But when we are actually together she's is very sweet, and can hold extremely engaging conversations, yet those times are few and far between, and I just feel like I'm putting more effort into making those times happen, and the relationship in general.

   Now reddit, this is where you come in. I need to address these issues with her and I could really use your thoughts on this situation, as well as how to broach the subject without sounding needy and whiny, and without sounding accusatory and angry. Any ideas?
<bot>: New girlfriend is very busy, doesn't text me without me texting her, and seems to not be putting in alot of effort