Whoa! Time out!
You're at step #857 of the process. She may or may not be at step #1.
Bottom line - there's a disconnect here, and if you open up by spouting words of love (and you even admit that you're unsure if it's truly that), then you will likely just freak her out.
So, you're friends. Excellent!
So instead of getting on one knee and telling her that it's the big L and all of that, how about something more like -
Susan*, can we get dinner tomorrow night? And not as pals; I mean as a date.
And see what happens.
*Note: For women not named Susan, substitute the correct name.