Family and friends know of your websites?
A few of my friends and family know of my website, and some are members (albeit somewhat inactive ones!).
I don't think many of them "get" forums and/or have little interest in them.
I haven't failed. I've just found 10,000 ways that won't work.
I post about Christianity Haven on Facebook a couple times a year so family and friends are aware of the forum...they just aren't active on it. It's hard to encourage people to take part in a forum when they're unaccustomed to that type of community life and my sister said that even though she hides behind a username she feels too exposed to post about herself.