How can I bring a Easter lily back to life?

I bought this Easter Lilly for, well, Easter and it's been dying and I can't seem to bring it back. Don't say it won't come back or to throw t away because that's stupid cause I know it will rebloom eventually. But how? Do I need to replant it? It's stillin the pot I bought it in. Or do I need to say the bulb? What can I do? I miss my flower. :(