I have read up lots of ridiculous stories about gamblers do lose out some serious amounts of bitcoins due to emotions.I cant really blame since its your money after all and i cant deny the feeling of craving for more bitcoins even you do know that you had already profited.Not accepting loss bets is one of the mistakes yet it would really urge you to play even on single bet then after that it would be an another story since chances of playing more is there.No one can help you but yourself and since you do still have millions then you should not gamble again if you dont like to lose it all.