My 'best friend' is ignoring me and I just feel so lonely?

[kate]

My friend has suddenly stopped speaking to me, I've texted her multiple times to make sure she's okay but she doesn't reply. She is clearly seeing my messages but ignoring them because we speak on Facebook/Twitter and she is constantly posting and seems happy. We have met outside of Facebook etc but we have to text in order to keepin contact because we live at opposite ends of the country.I have absolutely no one else. I have this group of people I sit with at school and they just make fun of me saying things like 'Oh Annie you look so radiant today' and 'You are the light of my life' but its sarcastic and they all just giggle to each other. They all hang out with each other outside of school and I've tried to go too but they don't invite me. There is literally no one else for me to speak to. It makes me feel so bad and has really curbed my confidence. No one ever speaks to me, nobody cares. I don't know what to do. I don't know what I have done to make people dislike me, I try my hardest with everyone but they won't let me be their friend. I feel so lonely, I just want to be loved.