I love her help helphelp helphelp helphelp helphelp helphelp helphelp help?

i can't bring myself to tell her. it's the last days of school and she hasn't replied to me if she likes me or not. We'll both be graduating and out of here soon, but i just want to know if she has the same feelings. i never had a girlfriend or any friends even. we are both outcasts. she comes to my school just to take one class. just recently i sent her a message asking if she likes me, but at school i chickened out and said that my sister sent it to her as a prank. What should i do?