Try smiling or winking when you do make eye contact with your crush. These are common ways to flirt with your crush from afar using eye contact.
Practice deep breathing, smile, and laugh to help yourself stay calm when spending time with your crush.
Improve physical hygiene if necessary, and avoid wearing clothing that offends your crush. For example, if your crush openly announces his or her distaste for gun laws, avoid wearing t-shirts that advertise your views on pro-gun laws.