Am I being silly?

I've been with my girlfriend for 1 year and 6 months, and she's currently away at a festival for 6 days and it's been 5 (a christian one). Whilst she's been away I've been the only one attempting to make contact by text etc, so on the 3rd day I left it to make her text first, and she didn't until around 9 in the evening. I was a bit annoyed and so I didn't reply with the normal "love you", and from this her friends got her phone as she discussed what to text me back, and bearing in mind we've been fine as a couple, they wrote how I never put her first and told me not to reply and to "sleep on it", and then accidentally sent it which my girlfriend said it wasn't her straight after. I was so annoyed that they told me what and told me what to do, which I said to her, and she said I was over exaggerating. She keeps saying that theres "so much going on" at the festival, but a text takes 30 seconds? I also asked her to ring me as she has certain times where she says ringing is best, so I said it would be easier if she did it. She's been so adamant about keeping in close contact when we're apart before, so this is really bugging me. I'm really feeling telling her straight when she get's back? Sorry, essay!

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