We've been friends for just over a year. Met at uni. Became quite close and we have told each other the ins and outs of our (sometimes comical, sometimes heartbreaking) relationship problems.
Everything was absolutely fine with us, we've never had so much as a crossed word so I can't understand what has happened :-(
We had arranged a night out Saturday night, Friday night she text me saying she couldn't wait and she had some funny gossip regarding a date she'd been on. Saturday I text her asking what she was wearing for the night out. No reply.
Saturday evening I text to ask if she was still coming out early to a mutual friend's house for pre-night-out drinks ... she replied "dunno, quite comfy sat watching TV at the moment, I'll meet up with you later". Odd as she's previously said she was coming for the pre-drinks.
So, from this mutual friend's house it's 8pm and I text to ask if she's still coming. No reply. 10pm we're about to head out to the club and I text to ask if she wants picking up on the way. She replies "I'm not coming hun, can't be bothered. see you soon x" 
I'd arranged to go out to a spiritual evening with her tonight and text yesterday to ask what time it starts and she hasn't replied so obviously doesn't want me to go.
No idea what I've done. The thing is, I'm having an awful time with my relationship at the moment and have taken the decision to cool things off. Very difficult to do when you love the guy and the idea was me and her would do things together to keep my mind off him. Now she doesn't want to know and I'm feeling a bit abandoned