[Lotus Eater]

I know that an internet addiction and a gaming addiction are two different things, but there are some similarities so I'm going to use my (previous) internet addiction as an example. I used to have to be on the internet all the time. Even if I wasn't doing anything productive, I'd simply have to be online in some way or other. It got crazy. My parents tried to confiscate my modem (too many times actually) and I would go on strikes (eating, talking, the works) and I experienced a lot of the mood swings you mention. I've moved on since then (thank merlin) and I am nowhere near as dependent on the internet anymore.

The first step to moving past this addiction is to understand and realize that you need to make a change - which you have already done so by posting about it. What you have to do now is to quit the game - or if that is too hard to do at this stage - try to keep yourself off it for a few days at a time, and then maybe reward yourself with one-two hours of gaming, then back to keeping off it for a few days. Find yourself distractions, by focusing on doing the stuff you've neglected to do so while gaming. It's hard to, I know, so I would advise leaving the house - maybe going on walks or for a drive - when you really want to game. It is going to be a lengthy process, and nobody said it'd be easy, but you can do it. You get used to it after some time and gaming less and less will simply become a part of your routine. Take up other hobbies, that may help. I know I started to write, more so than usual. And the final step will be to realize that you can live without it, and that it really isn't worth your time at all. Like you said, it's been affecting you and stressing you out.

Hope this helps. Good luck!