Head and Heart: Entering the friend zone

No matter how old you are, making friends is tricky business.But at least in your youth, you had the time to get to know someone slowly, at school or university, where a relationship can build naturally.With the daily demands of adult life, even if you have enough in common with people you see at pilates, school drop-off or work, it's hard to find the time to road-test that relationship.So without the luxury of time, how do you get out of the acquaintance zone, and into the friend zone?