move to a state of different ways to Yeat seniors?

I'm moving to California for college when they turn 18, but I wondered whether it would be a good idea (or possible) to attend my senior year in high school too. I 18 of August 22, which is a couple of days before the start of the year school, so even if my parents do not live there, you may be able to buy an apartment and use it as my place of residence. Is this possible? The reason could to, because high school graduates from my girlfriend when she is 17, a year before me and his mother would not let him live with her once she turns 18 (September 9 this year) and because they both go to California for college, we believe it may be easier if I went for my last year as if it would not get an apartment here for a year. So is this possible or do I stay where I am in my last year?

Stay Where You Are to your friends in your last year. It's so fun to graduate with the people I have known all 4 years of HS, and maybe more. Wait til summer between HS and college to travel.