Please help :'(

Okay I found out just before that my ex likes this girl and i'm absolutely heart broken, i just feel like dying right now. He was horrible to me in the relationship anyway and people said i could do so much better but i can't stop loving him no matter how hard i try.
I know in the next like few days he will be with her ,what can i do? :'(
I just want to die right now and i can't get over him :'(
it's been nearly 8 months since we broke up.