You need to offer a woman something before she's going to be attracted. If you're needy, worrying and complaining all the time then it's highly unlikely you'll attract any interest.I worry that I will die without ever experiencing intimate love ever again.
You need to have interests, prospects, positive energy, opinions, etc. Some reason why she would want to be around you.
If you don't offer anything positive then why would she want to be around you? She'll look elsewhere.
I've not had a girlfriend for a long time too. It's easier if you're working. I don't have the energy to work because of mental illness. But even so I can pursue interests with the energy I do have. And work on my personality. And get out whenever possible. Will it end with a girlfriend? I'm not optimistic, but you never know.
What I do know is that getting desperate isn't going to get me there. Complaining about it isn't going to get me there. Panicking isn't going to help either.
Hope this doesn't sound too harsh.