Just let this be a lesson to you mate!
If you pick a fight, then stand up and fight. If you lose, then you lose with your dignity intact.
If you make a bet and lose, then pay up. There is no shame in losing a battle or a bet. But there is plenty of shame if you go back on your word and don't pay up.
If you can't afford to make such big bets, then don't be stupid enough to make such a large bet.
You will always be the forum's lying bastard from now on. You will be ridiculed and shamed as the lying bastard you really are!
You picked on the wrong guy mate, and made a massive fool of yourself.