I assume you are going back to CA after the family situation is settled....
Then marry to person if you wish .. you can marry on f-1 ... state welcomes all in this respect
Green card? Its pretty quick .. but time is of no issue, once applied for you'll be OK to stay
CA citizen? Unknown to me, maybe others will chime in ... same with tuition (although your school should be able to tell you these answers)
But then you would live in CA ? Eh, up to you I guess.

