When Will I Learn?

After nearly 8 Years of living here I should have learnt the following.

If you ask a Spanish Person "Will you be coming here tomorrow"  and the answer is anything but "SI" - That means No.

Quiza Si = NO

Te Aviso = NO

Creo que Si = NO

Ojala = No

Me Gustaria = No

Unless the answer is a short word on its own which is "SI" dont wait in for them

Yes, you guessed it, I started my morning waiting in for someone who obvioiusly isnt coming.