If cycling is a significant part of your life and you would like to share it with a significant other, your choices are find another cyclist as a potential S.O. or try to develop a non or casual cyclist into an enthusiastic recreational cyclist. The second approach is challenging and requires a very light touch.
Charity rides offer an opportunity to meet people who are a little further along on the recreational cyclist spectrum.
Or just keep riding solo or with your hammer-fest mates.