I did that. I had plenty of friends, but no girlfriends ;)

I realized that increasing the surface area mostly only matters if you’re increasing the surface area of meeting the kind of person you want to date. As a hetero man, I was not doing activities that included many women. But I still don’t know what I could’ve done differently, because doing activities involving women that I don’t enjoy, so that I can be on the lookout for potential dates… doesn’t seem very enjoyable, and also seems a bit creepy. On the other hand, going to activities I don’t enjoy and not looking for dates seems rather pointless.