How do you describe this feeling? How do I solve it?

So, I am living at home and going to school at Southeastern Louisiana University. The school is in Hammond, Louisiana and recently some things have unfolded. I have a cousin who worked and lived really close to me. My cousin was my closest friend and he just moved to Baton Rouge, Louisiana which is about an hour away. I feel like I don't have much here anymore besides my family (I haven't moved out yet) and I really hate SLU. I am considering transferring to LSU but I feel like I shouldn't. All of my cousins friends like me and we all get along but I feel indifferent about living with my cousin. Some of the best weekends of my life are ones where me and him went to Baton Rouge. I feel as if I have no one here. He moved Monday. Could this feeling be a sign of just wanting to move out and be with friends or maybe it's just a feeling of sadness and having noone? I need help