The fuller answer
Crushes and sexual attraction begin on different timelines, and some people experience little or no attraction. Stress, depression, medication, illness, trauma, privacy, and not meeting the right person can also affect what someone notices.
A person may later identify as asexual or aromantic, use another label, or use no label. Not having a crush now does not require a prediction about the rest of life.
The useful distinction is between a neutral lack of attraction and a sudden loss that comes with distress, depression, pain, hormone symptoms, or medication effects.