I've always identified as straight, but there's this one woman

Hi all! I'm new to the site; a friend referred me here when I called with questions about what I was feeling. I am a female in my 20s and have always identified as straight. However, a week ago we got a new intern at work that I was instantaneously attracted to. Not only have I never felt this way about a woman before, but I've never felt such immediate attraction like this to a man either. My dating history is completely comprised of men, never have i felt any sort of attraction towards women, so this has surprised and confused me and I don't know what to do next. The woman in question is gay, but I don't know how to proceed. I'm floundering quite a bit and looking for some advice. Thanks!