Ask a crush second time?

Hi, I have had a crush for a year and half. I have one day the courage to ask her out, but unfortunately she has had a boyfriend at the time abd rejected me. I kept still being friendly with her and learned recently she broke up with him few months or so ago... I still have a crush on her all that time. Do you think I should ask her again? she's so sweet around me. Im afraid she will say no, again. What if she is seeing someone already? I feel like Ill look like a fool for trying again? I'm being tormented by these questions for the past week. Would you ask again somone who rejected you before? If you say ask, should I ask her for a coffee or dinner?

Ask a crush second time?
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