The way I look at it, we only have one Life to live, which means with interests outside swinging taking up biggest chunk of time, there's limited time for swinging. I feel it's therefore safe to say of all the people we could be interested in, it's important to spend time with the right people having the better chances of "taking things further".
With that said, if I'm talking to someone and they aren't interested, PLEASE put me out of my misery SOONER rather than later, so I can invest what's left of my limited time in people that do want to take things further.
No point dragging things on (in some cases, years) in the name of (best case scenario) "oh, I didn't want to hurt your feelings" or (worst case scenario) "I hoped you'd get the hint".
I'm a guy. I don't get hints.
I don't get subtle hints.
I don't get obvious hints.
Want me to get the message? Use words and clear communication.
If we were meant to be psychic and mind readers, we would be.
If you fail to use words, and worry I'm still "perstering" you years later, that's your fault, not mine.
So yes, sooner rather than later please, I do appreciate that