2. Tell someone: You have to have at least one person in your life (the more the better) to whom you can share your feelings and let them know about your situation. It will help a lot because if you continue to live in isolation with that feeling, trust me, you will not be capable of taking care of yourself.
Let me emphasise more on this because the aspect of telling someone is very crucial in regarding gambling matters, because they can either break you or make you.first thing to do after having such huge loss it to entirely take a long break then after which limit your gambling habits, so having someone in your life don't really matter except it's someone that advises you to avoid such gambling activities.
Telling that someone is not just some random person you meet in the street; it should be someone whom you have already known for a long and their capacity of handling such kind of information if it's the type that will give you good advice or if it's those that will blame and make you feel bad about yourself.
No doubt some people are really not worth telling about our gambling story. Some people can't take that break on their own unless they have someone on their side to always be pushing them and reminding them of the importance of taking that break from the game, which is why I also consider the telling someone a tip from the OP useful.
Sharing your gambling story or disappointment should not be a person that know nothing about gambling. Gambling is more of understanding and anyone we want to tell about our disappointment in gambling should be someone that have been a gambler before and have the experience, so the person can give us hint on how to survive as a gambler. We need to be very selective here because its not everyone we tell about our gambling activities and disappointment that has that understanding to adverse us based on how we are feeling. There are still people that can advise us wrongly and make us feel bad about gambling which can have some uneasy thoughts.