Most of us gamblers probaly have experience that, but it's a bad attitude mate, it's like we aren't good in accepting our losses and that we would involve other people with our disappointment in gambling. It normally happen when we aren't gambling for entertainment only and we do risk money more than our budget, I would not use "money you can affor to lose", as there are times you can afford to lose the money you are gambling but it's already out of your budge, so in the end, it will have a big effect on your emotion.
You are right. Your gambling emotions reflects only when you have a personal motive towards your gambling and you must have been staking above what you can afford to loose.
The Op is being overwhelmed by his winnings and his losts so, whatever outcome he gets from the gambling is being related to his emotional actions.
If only you can stake with what you can afford to loose, either your excitements or your aggressive emotions in your casual life wouldn't be associated with your gambling life talk more of involving your family out of it.