I have a crush on my colleague, what should I do?

Help!
I'm a student who works in a cafe only at the Saturdays as a waitress. And the guy I'm working with is super cute. He is the bartender who prepares the drinks and I'm the one who serves them. But unfortunately it's always so busy at the Saturday we never get to have any single conversation other than orders. Besides, he is brother of the owner who is also our chef there. She is always watching us and it's been two months now, I don't know what to do. Do you have any ideas or advices that would help me to get us closer maybe?
I have a crush on my colleague, what should I do?
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