My daughter back at uni tomorrow after the holidays i suffer with anxiety and depression im so scared of being alone?

Are you in treatment: For your depression ; anxiety? If not, that would be a very good place to start. There is no need to be miserable. Fill you life with people ; activities outside of your daughter. If you fear being along, besides getting treatment consider a pet. The right pet can go along way to helping soothe anxiety ; depressed mood as well as loneliness.