• We can join groups formed that have common interests as ours or team sports of any level. This boosts our confidence as we get a chance to talk on topics we are comfortable on such as writing poems, painting, quizzing, meditation groups, book clubs, religious activities, choirs, hiking, etc
• Becoming friends with someone from another culture can require flexibility (on both sides), but the chances to learn, help, and expand our awareness are endless
• Offering help usually finds a receptive audience. At some point, everyone needs a ride, plants watered, something repaired, brawn for moving, assistance at work.
• Night drinks or lunches to celebrate employee birthdays. Many people make friends at work. We can open ourselves up to the possibilities by participating in social occasions,
  such as Friday If we don't work and have no particular hobbies, joining a volunteer group with a charity that interests us can be considered. We can use our existing network of family and friends to meet new people.
• Don't turn down party invitations. We can make friends while traveling whether it is long journeys or short ones.
• We can make friends in camps too.
• Go for online communications such as chatting if cannot indulge in groups

Well just remembering birthdays and acknowledging special times (achievements, losses) let know you are thinking of them. Making cookies or desserts for our colleagues is both emotionally and physically nurturing, and this attracts others. Not all ways of connecting have to be extroverted.