Same thing happened to me. I just (literally) tried to call my ex. Her phone says the number has changed or disconnected. I think she blocked my number. She also blocked me from all sites too.
We were together for 3 years. We lived together. She went out with her cousin one day to hang out. I have never seen her again.
For awhile we talked (only via text & e-mail) about trying to work things out. But every time I accepted meeting, she canceled. Her friends also had a huge influence on that. Not only writing horrible things on her Facebook wall like' maybe we will get lucky & he will kill himself', but also writing me.
They invaded the relationship like a plague & gave her no way of saving face if she took me back.
I know where you are at. Because I am there too. The pain is unbearable for me. While I am sad & find it hard to do anything, she goes out & parties like it is just another day.
I am sorry, but i think both of us should have had patience & not contacted the other person. That really is the only way they would have come back. They would have missed us too much. Sometimes it is too little (or too much) too late.
Sorry!