Afraid of being alone or not happy forever. how do i get over it?

ive had a really tough year with 2 HUGE breakups back to back. one was a 4 yr relationship and the other got serious wayyy to quickly. im also going thru a tough time financially, academically, and any other way probably. how do i get back on the right track to happiness and finding love again. im petrified of being alone. im away at school but most of my friends graduated or will be and then going back home. i dont want to go back home at all bc i started a new life when i came to school and did have a plan in front of me with the girl i was going to marry and a lot of friends. but now my life has flipped upside down and ive been really freaked out for a while now. any advice or ways to get my life back?