I'm guessing you live in San Diego. That's not that far from L.A. Some kids go across the country, even across the world for college. I suggest you stick it out. UCLA is a great school and you don't want to destroy your career possibilities by going to a community college or SDSU just because you miss your parents for a short time.
Make some friends and you'll miss them less. These days there are cell phones, video chat, etc to talk to your parents. And if you really have to see them, it's only like a 3 hour drive.
Like Snow said, you need to find independence and learn to do things yourself.