Sazzle
As you've mentioned your music teacher being out of bounds, then the 3 swords can mean wanting someone or having feelings for someone who is unavailable to you....as simple as that.
3 cups rx would be unrequited feelings, of where the person never says anything about this, they'll keep it to themselves.
Example: You like someone but never say anything, you become shy about this, they don't know how to tell you, or even if they ever would dare to.
Hi
Sharla.
Definitely never throught about 3 cups rx as unrequited - have seen the 2 cups rx as that though! Interesting take though, I can definitely see if it works for future readings
Would the 3 swords not then be my feelings not his? I also don't have any feelings, it was just pure curiosity (and boredom on a weekend hah) that led me to ask. I suppose it is an outcome so maybe MY feelings may change for him towards wanting him in the future- who knows with life sometimes lol