You profess your feelings, she professes hers back in kind, hooray!
You profess your feelings, she doesn't feel that way, you stay friends and you have to FULLY give up on your romantic feelings toward her (otherwise it's something that will always be hanging over your friendship [I think this is the hardest option for you]).
You profess your feelings, she doesn't feel that way, it's too hard for her to be friends knowing you'll always want something more and your friendship is gone, you both move on.
I'm definitely missing some more nuance, but these are kind of the broad categories I could come up with. The questions you should ask yourself are: is it worth the risk to act right now? Do I have enough information to make a decision on this? If not, how do I get more information in order to make the best choice?
Also if it's only been in the past couple months you've been growing closer, give it more time. Like several more months. If it continues to develop, you might get all the information you need!
I'm getting my real estate license! After working temp, retail, and other dead-end jobs for years, I'm excited to do something where I have the potential to really grow into economic comfort and success.