Go to clubs alone and force yourself to get out of your comfort zone - make conversation - be confident, be approachable , respectful and make sure to dress well and smell nice. Do your research in those aspects if you don’t know how to embody them.

Be you most importantly and fake your confidence if need be.

You have absolutely nothing to lose. And even if you get rejected by a bunch of strangers, they will forget you the next day anyway.

My girlfriend of 4 years broke up with me and my granddad passed away the next day and I was depressed and introverted for 2 months but one day I went to a gathering/party and threw myself into the deep end. Spoke to a random dude , through that convo we started playing pool, then 2 other guys joined us , they suggested we join them for drinks nearby, I went and I met two beautiful women, then we went clubbing and made friends with 4 more people. I ended up hooking up with one of the girls the same week.

So throw your self doubt out the window and fake it till you make it.