Would you pursue someone that isn't interested in you?

Nah

Unaware of what exists or where, and one that could be talked with would make that a worthwhile effort.

Though may as well not exist.

No

No

I’d sauce them

That would be a waste of time.

No, once my crush isn't interested I get crushed. And sulk into that feeling and stay the hell away from them

In a word? Nope.

I wouldn’t if I had definitely gotten confirmation they weren’t interested

What for? I'd rather someone who at least shows a bit of interest in me.