Is it possible to attend a University that you were admitted to two years prior without having to re-apply?

I got into my dream school (Arizona State) two years ago right out of high school, but could not afford to attend. Instead I went to Eastern CT State (worst school ever) and suffered for two years. Now I am thinking about other places I could go and I remembered that I could still maybe go to ASU. Does anyone know how this stuff works and what I could possibly do with this situation? THanks and have a great day.