Like most things in life making friends is part luck, part opportunity, part effort. You can't sit in alone all day and expect new "friends" to knock on your door. You have to get out and try new things, create opportunitys to meet new people and then put effort into getting to know them. Some people are lucky enough to meet new friends easily, others have to try harder.

I disagree. it's largely luck and being in the right place at the right time.