"Attainable Love" by Christine Lavin.
Heck, probably 3/4 of Christine Lavin's songs are about unrequited love! The other 1/4 are about being unable to find love at all.... or settling for .... something.... like "any guy with an air conditioner" LOL
why torture yourself ?
The Ponytail Parades by Emery helped me.
I'm not in love, by 10cc... old but good!
Or try this!
"Crying" by Roy Orgbison. Check out his duet with K. D. Lang
anythin from Ghost............oldie but goodie Feelings ;-)