How can I Improve My Site?

I have created a new web site www.able2date.com but few of my visitors add
their details and most appear to just have a quick glance and then disapear.
What can I do to improve my service? I just cannot see the wood for the
trees and do not know what is wrong especially as my service is totally
free!

Any suggestions would be gratefully appreciated.

Thanking you in advance

Frank Lennon