I have answered this for you elsewhere but I will also post the same reply here.
We have hundreds of guests at our site and maybe one or two sign up but that is one or two more than you will get if you keep opening and closing the forum.
the forum genre is unique but you have to get it very inviting to people as it is going to be about people personal lives and what not.
My best advice is to stick with it make a load of topics to start people off that way when someone joins or looks in they will see it active with new threads being posted that will then create a discussion with people, if the forum does not look active (new threads being posted etc.) many people will look away rather than look in.
You will be wuiet for a godd two months but in that time you will slowly see a rise in active members and then you just need to keep it fresh with new content to keep the members interested and give them something to talk about.