Do I play video games too much?

I got my first gaming device ( Nintendo Dsi ) somewhere near late 2009 and early 2010.It was okay then.A couple of months later, I got a ps2 with several games COD Finest Hour being my favorite.The matter was still under control.Now I gave my dsi to my Sister and never play my ps2 anymore since I bought a xbox 360 with my own money.Soon I got black ops after 4 days after release date ( with my own money ). From then to now, My per day average is 2 hours calculated statistically. The Max I have ever played is 6 hours only twice in my life.Now my family thinks I am addicted including my Mom, Dad, and Both sisters.I being the youngest, am helpless. No one else plays video games besides me. And still, I have the BEST grades compared to my sisters. I get straight A's and few A+'s. Last time I got a B was ...... Well I don't remember. I am a 13 year old male going in 8th grade. I usually play around 2-3 hours now thats it's summer but only like 1.5 on school days finishing my homework every night. I also do my chores, socialize, and am very smart when it comes to technology. I extremely good with computer hardware and handle all the Techy Stuff around the house. I do it, Not my parents. My dad doesn't even know how to open the Internet ( LOL ). And I gotta teach my sisters How to sync their ipods, use a program, etc.... Overall I think that I'm ok but my family just keeps bothering me about this. They keep telling me that they will take away my controller if I play too much. My sister, however , makes it worse. She blames all of my mistakes on Video games. One time she was about to go to a week trip, and she asked me If I was going to miss her. I honestly told her no and she was all like " Yeah because your going to be too busy playing your games to even remember me! " with a mean attitude. My Mom and Dad aren't any better. I mean they are very caring but don't let me play. I know how much I should play and am self dependent on most things being responsible. Do you think I play too much? What should I do to convince my family to not be so mean about this. I have been emotionally hurt several times too because my family thinks I have gone "crazy " . Please Help!!