How to have a normal love life again?

I had a normal love life before the pandemic, when it ended I noticed that I had already become a lonely guy afraid of talking to women. Nowadays it's as if I've forgotten something very obvious, like riding a bike, as if there's a very obvious secret that makes people normally have normal love lives whereas to me that seems extremely distant today. I simply can't be confident enough to flirt with someone anymore, women usually see me in a rather stupid way, I feel unable to be seen as a real interest for someone and I haven't been able to pinpoint this reason for years, because it seems like no one has actually verbalized it to me so I know what it is. I have geeky interests, people usually like to talk to me in friendly contexts, but every time I try to approach someone I'm interested in, things happen as if I shouldn't be doing that, and in the end the person ends up thinking I'm stupid.