Calling a raise pre-flop with an 8 2 suited is horrible. And I doubt that he was a good player...good players don't play and win consistently with luck. You have to play odds...heads up is different but not in a game with 8 players. You played the hand well, and would have won had he not entered like he should not have. You just take a deep breath, and get ready for the next hand. Just keep that in mind about your opponent. In the future, you may want to come a little higher to root out the drawers.