I don't recommend telling people you like them right off the bat due to this kind of awkwardness it brings. There is a time and a place to say certain things and this wasn't one of them.
What can you do? It's a difficult decision. You have little choice. Have a chat with her where you talk about how you feel and find out if she would like to be with you. If she doesn't then you will need to end the friendship and look elsewhere.
Don't cry, don't regret and don't blame
Weak find the whip, willing find freedom
Towards the sun, carry your name
In warm hands you are given
Ask the wind for the way
Uncertainty's gone, your path will unravel
Accept all as it is and do not blame
God or the Devil
~Born to Live - Mavrik~