I’d say it’s worth everything.
Even still, you’re obviously worth something to someone. Your employer must think you’re worth your salary, for starters. Your co-workers who are shocked about your dating issues must think you’re worth their time to listen to you talk about it. The literally dozens of people who have tried to offer support in this thread must all think you’re worth their time - I’m spending some of mine right now.
Look, you’re feeling lonely and socially ignored. I’m the last person who would ever tell you to act all Alpha male and machismo, but it’s hard to get away from the fact that fragility, gloominess and melancholy aren’t always the most attractive qualities. If you keep telling yourself that your melancholia and anxiety defines you as a person - which you seem to be doing - you’re not showing people that you want to be social and have fun. Show them the actual you, not let your demons define who your social persona is.
Let me suggest something a little bit left field-ish, and forgive me if it comes across as hippie rubbish. Have you ever considered taking acting lessons? If you can’t feel confident and attractive, maybe you can learn to act like it? Either way, you’ll meet people.