I am not a professional in this types of situations, but, well, heres advice that I've heard all over the place, just ask your crush out, be confident don't act shy I know it will be very hard. But like Shia LaBeouf once said, DO IT, JUST DO IT, DON'T LET YOUR DREAMS BE DREAMS, LET YOUR DREAMS COME TRUE! JUST DOOOO ITTT!--- Okay I am getting off topic. Keep in mind I am not an expert I am just trying to help out with the information I know.
P.S. I wish you the best of luck with your crush situation, and Happy Valentines Day! :D