How do I get my confidence back?

I’m a straight guy and have been single for nearly two years. However I have zero confidence in myself to talk to girls or make a first move. I also get really nervous and paranoid about what they would say to others, would word get around? I’d be so embarrassed which further discourages me. I’ve also had some bad experiences in the past which puts me down. Anyone have any advice to get me back on my feet and feeling confident enough to get myself back out there?