OP, I was in a similar spot last year. I was pining after this girl for two school semesters straight, was convinced she'd change her mind and that she was so amazing and wonderful. Over a year later and I still cringe in embarrassment at what a creep I was and question what I even saw in her, and I'm with someone who I love for reasons beyond "omg I'm obsessed with you and got the idea in my head that you'll make my life better and I'll die without you."
The only thing that will come out of you not dropping this here and now and leaving her alone is future embarrassment, regret, and a potential job loss.