So the realationship between characters isn't going well. ANd hte other person is boding over it, or needs to tell them. Here are some helpful words for that situation.
Abandoned
Affair
Alone
Argue
Argument
Betray
Bicker
Bleak
Blue
Bored
Break up
Brokenhearted
Cheat
Cold
Companionless
Compete
Dating
Depressing
Deserted
Desolate
Desperate
Detached
Difficulty
Disagree
Disagreement
Disappoint
Disappointment
Dishonest
Disillusioned
Drift apart
Empty
Experience
Failed relationships
Failure
False
Far away
Fear
Fight
Fighting
Hardship
Heartbreak
Heartbroken
Heavyhearted
Isolated
Joyless
Lack
Lacking
Leave
Lie
Lonely
Lonesome
Loss
Lost
Lovelorn
Mean
Miserable
Parting
Quarrel
Regret
Removed
Sad
Scared
Single
Solitary existence
Solo
Sorrow
Sorry
Split up
Squabble
Stray
Struggle
Uncommitted
Unconfident
Unfaithful
Unhappy
Unimpressed
Untrue
Wandering eye