You really don't, humans are by and large social animals, so while you might be able to suppress that feeling, there's little chance to get rid of it entirely.

I agree with the other comment though that you need to build general social circles first and foremost. That's how most relationships start anyway, through mutual hobbies and interests.

Just don't go waltzing into any hobby gardener meetup with the only thought in mind to find a partner, but rather get involved with something you care about and then see what happens. Be that a book club, board game session, arts & craft stuff, sports, or whatever, just make sure it's an actual interest of yours.

And if it's the no sex part that contributes to your insecurity, then seriously, find a paid companion. If that's illegal where you're at, find a place you could go without repercussions. I've seen people transform over such encounters, no matter how frowned upon it might seem in society.