Some ideas that may or may not pan out:

- Get a pet.

- Volunteer for a non-profit organization.

- Go to church.

- Visit and talk frequently with family members.

- Join an online dating service.

- Talk with or visit your neighbors as frequently as feasible.

- Every time you go out shopping, make a point of engaging in light conversation with people who work where you shop.

- Take music lessons at a music store. Make a point of engaging in light conversation with anyone you see there.

- Take night courses at a college. Any subject. Make a point of engaging in light conversation with anyone in your classes. Suggest that you study together.

What you need are random collisions with other people. More random collisions means a higher probability of meeting someone you get along well with.