Yeah, I agree with you and the others; take some time to go through the grieving process and eventually make it to a place of healing. I'm sure you will know it (in your heart and mind) if and when the right time for you should come to re-examine polyamory. Not that you can't still learn about it if you want in the meantime of course.
I hope you'll find that Polyamory.com is something of a refuge for you during this difficult time.
Love means never having to say, "Put down that meat cleaver!"