re: I'm about to take my last final at LSU as an undergrad

Chin up. You'll be surprised how easy it is to continue making friends as you transition to adult. Depending on your career or where you're moving you'll be meeting 10's - 100's of others just like you. Find a local alumni chapter, live in an apartment that skews young and don't be afraid to strike up conversations with people that work for your company but in different groups. Get ready to enjoy the years that are more fun than college (really).