Full disclosure:
I went to rehab for substance abuse (in 2 months ill be sober for a year) but while i was there they classified me as a gaming addict as well, the problem with that is they say you need to sell your PC to completely get rid of that specific addiction.
Now i think that would be a bit harsh as you need the pc for other things as well.
But before that i put in about 7-9 hours of gaming in on top of 10 hours of work in a day, and that made me hella depressed, so i took a break and my mind sortof reset itself, now i feel good again, and i dont play into the early hours of the morning anymore.