How long would it take me to learn French?

I’ve just turned 18 years old, and I have some experience with formal French study because of the classes I took in high school( 3 years) and most of us know high school isnt enough to get to a good level. Basically, I have a basic French knowledge, and want to know how long it would take, after you learn the basics(which i think i have down), to get to an advanced level(can watch tv, listen to the radio in French without much trouble and of course have little troube with speaking/listening to natives). I have a French-English dictionary, some online french learning websites saved to my favorites, a French for dummies book, I have movies I can watch in French, and I’m getting a computer mic so I can practice speaking with natives online via skype(and maybe other sites) and I’m getting one of my favorite books in French and will continue to read French texts.