Sounds like you're in a rut. This is affecting your outlook into one of pessimism.
Personally, given that meeting someone is not something you can entirely control anyway, so isn't going to happen overnight even if you decided to have faith...
I'd plough my efforts into not feeling old and past it. I'd try to jolt myself out of a rut by embracing something new.
There is nothing more aging of the outlook on life than arriving at a point where you think, right that's it, this is me. This is all I am and all I will be, I'm done.
Whereas, trying something new on for size is incredibly invigorating and kick starts a process of refreshing oneself and waking up parts of you that have gone to sleep and are dormant.
I'm going to give you some inspiration now, please have a listen... This doesn't have to be a template obviously, but if it doesn't inspire you to feel your blood running in your veins once more I don't know what will, because this is a story of someone who anyone - including herself - would just think is just dead ordinary... But decided staying as she was wasn't for her....
https://www.bbc.co.uk/sounds/play/w3ct5nyg?partner=uk.co.bbc&origin=share-mobile
What you stand to gain if you brush yourself off can only be known with hindsight, but you can at least reasonably expect to lose the 'old and past it' feeling, maybe acquire new friends, maybe find love.