A simple way to show her that you're interested is to greet her warmly when you see her. Smile at her and greet her by name. Ask how she's doing. Small, caring gestures like these go a long way. For the extra mile, hold doors and pull out chairs for her. Who says chivalry is dead?
Talk to Her
Strike up a casual conversation with her whenever you get the chance. Ask about what's going on in her life and really listen to her. If you show genuine interest in what she has to say, she could pick up that you're interested in her.
The Little Things
When she talks about the stresses of her job, or her brother's wedding reception, remember the details and ask about them the next time you talk to her. Women like to know you're listening. Making mental notes about the details of her life shows that you have a true interest in getting to know her and that you really care.
Most women love a little flattery. So, tell her that her hair looks pretty or that her dress is beautiful. But be careful -- if you dwell on it, you'll sound desperate. Give her one honest compliment paired with a smile and she'll think about it for the rest of the day.
On Your Mind
When you're not around her, send her a flirty text message or email that subtly lets her know you're thinking of her. Tell her you finally tried the restaurant she was talking about, or say you heard a song on the radio that reminded you of her. Keep the conversation short and sweet, and say just enough that she starts thinking about you, too.
This is the most tried-and-true way to let a girl know you're interested in her -- just tell her. Let her know you'd like to get to know her better and ask her on a casual date. She'll be flattered by your offer, and you might just get a chance at spending more time with her.