Hi Angel 7!
Who says that we don't believe in the afterlife? This is part & parcel of traditional, normative (i.e. orthodox) Judaism!
Our very great medieval Sage Maimonides listed 13 principles of our faith (http://www.ou.org/torah/rambam.htm). I cite:
11. I believe with perfect faith that God rewards those who keep His commandments, and punishes those who transgress Him.
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Any Jew who denies judgement in the world-to-come is a heretic. See
http://www.jewfaq.org/olamhaba.htm.
Be well!
stillsmallvoice