Don't.
Okay, that could easily be misinterpreted. What I mean is don't look for one. Live your life. Get to know yourself. Find some hobbies, start some projects, do some cool shit. Not as a resume for a relationship, just to do it and be fulfilled. You don't need to find someone right this moment.
The worst relationship I ever had was because I was young and lonely and bored and I ended up dating someone who nearly destroyed my life and dominated everything about it. Took 5 years to get away from it. Subsequent relationships suffered, though not because my partners were awful, I just wasn't worth dating.
At some point, I just got tired of it and "retired" from dating. I took care of myself, did things that interested me, and relaxed for a few years. Just me. I got really happy just being with myself. Then, my best friend of nearly 20 years and I ended up starting a thing nearly on accident, and now (a few years later) we're very happily married. Absolutely would not have been possible unless I'd spent the time to figure myself out.
You can be single and still have lots of friends and socializing.