I must be getting depressed again

The feeling that there's nobody for me has been getting stronger again. So since nobody wants to be close to me anyway, I think I'm just going to stop with everything. We may be friends, but it's a work friendship - it doesn't extend beyond where we normally interact. And since it won't happen anyway, I have to learn to be touch-free and just cope. I know I'm great, but if nobody is interested then why should I be.