I know the feeling. I spend every day alone, every night alone, and often can't sleep and just end up doing nothing at all feeling lame that I don't even have anyone to talk to. All my friends live far away in other cities and are far busier than me.
I have always struggled with loneliness and it has lead me into some unhealthy relationships just because I didn't want to be alone.
I don't know, these days it's worse with cancer and feeling like I've become worthless to the world.