The career you begin pursuing may not be around in four years when you graduate. Ten years after you graduate college, it's likely that you will be working in a career you didn't perceive as possible when you began college. Look for challenges inside and outside the college classroom. Some of your best learning will be done outside of the classroom. When a student begins college, parents are doing a disservice to allow him or her to leave before completing at least one semester, and preferably one year.
Students sometimes have a hard time adapting to newness and to change and to stress.
Homesickness is not a problem. Don't expect college to be like television or the movies. The kind of experience you have will depend on the effort and time you put into college. If you are not satisfied with how you are doing in school, the first place to look is at yourself. You might find out a lot by looking inward first, instead of just transferring to another school.