There is someone whom i think has fancied me some time but i could be wrong

I did not fancy her.

Suddenly i do. I asked her for a coffee and she said yes but we did not go yet. Because i want to figure out how to tell her without offending i am not into just friends. i do not want to be caught in the friends trap.

How to make my hopes for relationship clear without being offfensive or sleazy?

She comes up on my fb feed. God help me i am on fb now, it is because of something i did which turned out quite a hit. I am not good on fb just see when she is online i get a notification