Most Helpful Guy
It means you never put a definitive term to your relationship.
Most Helpful Girl
Hmmm, that wouldn't fly with me. I'd think it's either you're in the relationship or you're not. Open ended can mean something very different to two people. Think about what you want exactly from the relationship and then explain to him. If you two can communicate better you'll understand your position and be more in control of what you choose to do. Hope you figure it out. :)