Honestly, what do you love to do? People are recommending different activities, but if they're not your jam, you're just going to be bagging someone else's bread. No sense going to a certain activity if it's not your thing.
What's your intention? You can meet people anywhere. In a grocery, on the bus... It's all about your energy and frequency. I meet people randomly and regularly that way. And usually if I remain open to the possibilities, I'm surprised by the outcomes. Suspend your expectations. Vibe as someone you love and you'll find your people wherever you are ("wherever you go, there you are"). Divine timing will arrange it.
Nah, it may feel that way sometimes, but it's actually amazing. I hope you have an experience soon that restores your faith and hope :)