Of course you would get upset in that amount of loss. It's not that you have a lot of money at your disposal but the value of saving it all is what's painful. You gamble for leisure but keep it in mind that lossing is inevitable. You still got a lot left so do not get upset too much and just relax and give it break.
I guess for someone in his shoes, he should have realized already that gambling is not something you should be paying much attention to and it is never too late at all to making amends rather than trying to recover losses. The mistakes a lot of people make is to be placing some wish on themselves on the aspect of trying to chase what they have lost and possibly gain it back, but in reality, this is something that have always ended up making people get burned in the long run.
This is a clear example of that, and my best advice would be for the OP to just accept the fact that he has lost, he has screwed up and he should look for better productive things to do to get better and discard gambling in the long run. It will take some determination though.