Why dont you just ask her out for dinner or something or to the cinema dont get to drunk but maybe just have a couple to sooth the nerves then try to kiss her at the end of the night.
If she kisses you back then jobs a good un if not then shes probably not interested.
Dont let this thing build up and build up until it will drive you mental mate just keep calm and try not to think to much about it.
Take things in your stride and i know its easyer said than done but you really have to try your best.