[ColinWright]

If you walk on your own, or stay in on your own, then you won't meet people. To find someone you need to interact with people.

If you walk and walk and walk on your own, that's not going to help you meet people. I don't know where you are or what is around you, but is there a walking club? Is there a bridge club? is there a tennis club? Football?

It's almost axiomatic that if you want to met a SO then you need to meet people, so you need to find local clubs or societies that you can join.

Does your local library have a bulletin board with listings of clubs in the area?

Clearly it won't be easy because you haven't done it yet, but if you don't make the effort to find some way to interact with people, then you won't meet people, so you won't meet a (potential) SO.