First....don't tell her, SHOW her that you like her. I'm not saying to make goo-goo eyes, or trip over your own feet trying to be her slave, or childish things such as that. I'm saying treat her like a LADY, with respect, good manners and affection. Just talk with her....about anything. I'm not saying to be a mindless blabberhead, just engage her in conversation. I've never figured it out, but women always seem to like to talk ;-)

If you do these things, she will get the message and words will be unnecessary. Nonetheless words will come, at the right time, and it will seem very natural to you.

Give it time, and good luck.