What a great thing to learn so early in your development process! The conversion rate -- from visitor to user or prospect to customer -- is a critical ratio for your team to understand and improve as you develop your business.
Lots of people -- especially friends and family -- will say "really cool" because that is what loving family and supportive friends say. But making the choice to become a user or better yet a customer is a bigger deal.
Fortunately because of your prior relationship you can ask them and really gain a detailed understanding of the reasons for their hesitancy and objections. In a way that you probably couldn't with random sample you can get into a more iterative conversation and gain a more thorough understanding.
First -- do not be hurt or in any way express dissapointment that they havn't signed up. don't make a personal -- "it would mean a lot to me" ask. Make it okay for them to say no.
And then inquiry why? fear? concern/ security? value?
Make a list of the reasons. Brainstorms ways to address. And then create a business development, marketing , and software changes to resolve.
Dreams are very personal. Interpretation of dreams comes with a certain need for privacy. Connecting based on dreams might imply a certain disclosure of this private information which would make many people uncomfortable. identifying how to address this on the site may be your challenge.