I had a family while in school and worked very hard for a good GPA, so I had little "spare time". As a result, I passed up many opportunities to hang out with classmates. I had heard the advice to build relationships in school, but I told myself that a good GPA would be all I needed. Don't do this to yourself. I wish now I had spent more time building relationships. You end up with great professional contacts, but more importantly, you can end up with lifelong friends (with common interests).
B.A. vs B.S.
That is Bachelor of Arts vs Bachelor of Science. When I started my bachelor's degree, I didn't know there was such a distinction. A B.S. will give you more math & science classes. If pursuing a degree in a technical field, consider going for the B.S.