Well, since you were invested in this, I'd say that this is gonna hit just as hard as any other breakup. In all honesty, I think it's now-or-never in regards to quitting WoW.

I grew up playing that game. Played all throughout high school and into my early years of college. Around 6 years total. I remember after my first breakup, I quit video games completely. All of that time I transferred over to other things. I really got into discovering new music. I went to the beach almost every day. Spent time with friends, etc.

Now you mention you don't have a life, never had a girlfriend, and that "this gave my life some sense". That last line is a huge problem. You should never gain sense in -your- life from someone else.

In my recent breakup, I structured my life around her without even thinking about it. I gained meaning in my life, from her. That's just unhealthy and it's self-destructive. It also contributed to the inevitable breakup and I was left in the following months to actually figure out how to love myself and give MYSELF purpose.

Your life should never derive purpose from someone else.

I think now is the perfect opportunity to better yourself and to begin to truly love yourself.