If you think it's a serious addiction that affects your wellbeing than the obvious answer is try to see a counselor or therapist or someone.
Otherwise, you could find a new hobby (reading, hanging out with friends) or become passionate about what you're studying in college and make that your thing...Or just learn to game in moderation. Don't really know what else to tell you, mainly it's something you'd have to do yourself, but if you physically can't, then the obvious answer is to get some help.
I can't see a counselor if I want to be a commercial pilot. That automatically disqualifies you or at least makes it a big [censored] pain in the ass to get your medical.
Now I'm not at the point where I can't function. Its more like instead of doing homework, I'll play video games until 11pm or instead of working out and staying in shape, I'll play video games for 4 hours.
There's your problem.
Do you really want to stop playing video games all together? It's entirely possible to focus on the important things and continue playing video games as well.
The thing is, I get too wrapped up into them if I play them at all. Once I start, its tough to pull away from them or focus on something else.