It's such a difficult thing to do, to be honest the first time I was open about my depression I was drunk and confessed to my next door neighbour, she didn't really understand but she tried to hard to and was so understanding that it made it easier for me to open up to others (not that I'm saying you should get drunk and tell people, more that even though it's hard it feels good to open up and once you've told one person it is so much easier to be open with others too)