Ever since my first relationship went kaput....

I can't move on, I can't study, I can't do anything, I feel so lonely and it feels physically painful, all my friends are gone and they're busy studying, there's no one to reach out to, my family are all busy members, my mind is stuck in eternal emptiness and this void can never be filled. I don't want to live like this. I don't want to keep on feeling guilty and anger and hurt, and to keep blaming myself, and keep on blaming the world for my pain, let it stop, I want this to stop, i can't do this, how do you cope when you're in despair 24/7? Why is life so unfair to the people who suffer the most in relationships? i keep trying to put myself in my ex's shoes to see how he felt about things, and I keep blaming myself, replaying scenes with him and different people I've talked to before keep giving me different answers ranging from me being in the wrong to me being too nice. Everything is confusing, and I don't want to live anymore like this. Can't stop thinking and it feels like the pain will never, ever stop....