• gad a crush on,
• bad a crush on,
• nad a crush on,
• jad a crush on,
• uad a crush on,
• yad a crush on,
• hzd a crush on,
• hsd a crush on,
• hwd a crush on,
• hqd a crush on,
• has a crush on,
• hax a crush on,
• hac a crush on,
• haf a crush on,
• har a crush on,
• hae a crush on,
• had z crush on,
• had s crush on,
• had w crush on,
• had q crush on

The adverb for "had a crush on" could be "secretly" or "sincerely", depending on the context. For example, "She secretly had a crush on him" or "He sincerely had a crush on her".

The adjective form of the phrase "had a crush on" is "crushworthy".