VOCABULARY building is no JOKE
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might be feeling like "the big fish"
the good news is:
"there are plenty more fish in the sea"
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some fish-words
selfish: concerned excessively or exclusively with oneself.
smell fishy: If a situation or an explanation smells fishy, it causes you to think that someone is being dishonest.
fishy: (colloq) likely to be false, dishonest, etc.
cold fish: A hard-hearted, unfeeling individual, one who shows no emotion.
on a brighter note
there are plenty more fish in the sea: Plenty of other suitable persons, especially for a romantic relationship.
big fish: (informal) important or powerful person in a group or organisation.