Just become neighbours with them :)
Too many, Farmville is lame
you save them during a mercenary mission and they may decide to befriend you
I personally hate Farmville coz it's crappy and there is nothing on it!
You cant.
Go to privacy setting and go to block people and apps, then look for farmville then block it
Go to the Neighbors tab and you will see an option to add neighbors from there.Another way would be to click on the "Add neighbor" picture on the neighbors strip on the bottom of the screen when you're on your farm.
79562437
No.
depends
16.5
Find people who share similar interests with you, and befriend them, but be nice to everyone.
The same way you befriend anybody.