What happened with Carrie in the end of the novel ? Did she die ?

Yes Carrie dies. Sue Snell has been receiving Carrie's telepathic messages and finds Carrie bleeding to death in the parking lot. Carrie believed that Sue and Tommy had set her up but comes to realize that neither had anything to do with the prank. Just before she dies she forgives Sue. She cries out for her mother as she passes away.