Don't worry about doing things just because you have friends there or not.....if you go through life like this you will soon find that you're just following everyone else and you'll be dissatisfied with life in general.

Make a list of things to do. Include "email instructors" and then do it one by one. It can help to see all that you have to do and then feel a sense of accomplishment once you cross it off your list.

Put your health first. Take off a semester if you are struggling and can't handle school right now. good luck!