PINE

to lose vigor (as through grief)

to languish

to yearn intensely

/have a desire for something or someone who is not present
SYN - ache, languish, yearn, yen

"Everytime that he would pine in this way for his ex-girlfriend he would quickily remind himself of joys of his single life, the misery of their dating life, and the general uselessness of pining for someone who doesn't want you."

"He had to remind himself that it wasn't her specifically that he would pine for but rather the desire that he had associated with her."

"As he walked through these circles he could tell that people pined for a revolution."