Wll, my advice is this:
- find a hobby you can share with others (in my case board games and cooking)
- search the web for people who do the same stuff in your town and who want people to join them
- get very nervous the first time you meet them but then find out they're nice people
- meet them regularly for that stuff and they'll become friends
- rinse and repeat, build up a circle of friends, of people you share stuff with
The only part about them that is now really difficult for me is meeting people for the first time. But once having done that two or three times, it's going to get better.