しつれん失恋shitsuren
1.
The experience of having romantic feelings that are not reciprocated or accepted, often leading to emotional pain.
2.
The state of a person whose romantic aspirations have not been fulfilled, typically resulting in feelings of sadness or loss.
3.
The event wherein one person does not return the affection or commitment of another, causing heartache and disappointment in romantic pursuits.
Example:
それから８ヶ月が過ぎると、ジョージは失恋から立ち直り、次第に色んな女とデートをするようになる。