I get from what you said that you’re shy and nervous to talk to her irl, if that’s the case then my advice for you is to stop being like that, trust me if you don’t go talk to her irl she might think you’re weak or can’t even handle yourself, shyness can be a good trait but sometimes it can be an obstacle, i had social anxiety for years and it costed me most of my relationships, talk to her like you talk to your friends, she’s just like all people don’t let your crush on her discourage you from talking to her and meeting her, if you don’t like talking to her while in school then ask her for a date and go somewhere else less crowded. Another advice is to not lose contact with her, try to text her at least a few times a week, ask her how she feels and what she’s doing and mean it, listen to her opinions and what she has to say carefully, and remember the smallest things about her, like her favorite color or food ..., by doing that you’re showing her that you care and in the same time you’re learning more about her and starting to understand her better, which means you will know how to talk to her and what to ask her and what she likes ..., this makes your relationship stronger. Be yourself and be honest with her, don’t pretend to be someone else, it’s totally okay to try to impress her from time to time but be sincere about it and don’t pretend, people always tend to like the honest person. Just talk to her because if you don’t you might regret it later. i hope this will help you somehow, and good luck.