So you're reaction to any little challenge/adversity is to quit and return to a 'safe' place, which has no benefit to you..?
Wow, that's borderline pathetic imo, you cant always stay within the confines of your parents house, eating their food etc. Learn some independence, grow as an adult, make new friends, uni is more just learning. Give it atleast a few months and you'll settle in, it's natural to be homesick so don't make any rash decisions which you'll regret for the rest of your life.