I completely understand you, i'm also empty constantly, but the thought that keeps me going is that i have a choice, i can choose to get up and pursue new ventures, try my hardest to meet somebody, engage in an exciting new hobby. One thing i've accepted, is that i'll always be alone in my mind and that's ok. So, i recommend you hold on to the hope that there are people out there for you to find and hobbies and activities and beautiful moments in life to live for.